Now, there’s a new option for these digital performers: Wii Music from Nintendo. This $50 game was designed for Nintendo’s hugely popular $250 Wii gaming system, of which there were more than two million sold in November alone, according to the company.

Wii uses motion-sensitive controllers to move characters in games. A game of tennis in Wii Sports, for example, works when you swing the Wii remote like you would a tennis racket. The Wii’s simple graphics and adorable Miis (on-screen cartoons designed to look like you) appeal to the non-gaming set, inciting parents to challenge their kids to games of Wii Golf and spurring senior centers to start Wii Bowling leagues.

People playing Wii Music use the remote as a musical instrument.

Nintendo carries this cutesy, user-friendly style of video gaming over to Wii Music, where the remote works as a musical instrument, cheerful songs abound and a white-wigged character named Sebastian Tute gives instructions. Along with Sebastian, the Tutes — a musically gifted group of Miis that would give the Von Trapps a run for their money — appear and demonstrate how to play various types of music and instruments.

Though it’s comparably priced, Wii Music differs from games like Guitar Hero and Rock Band in many ways, and there are understandable reasons why a frequent user of those games would shun Sebastian and the Tutes. For starters, teenage fans of Guitar Hero and Rock Band who like the games’ variety of popular songs may gripe about Wii Music’s selection, which includes the likes of “My Grandfather’s Clock” and Beethoven’s “Ode to Joy”; none of Wii Music’s songs are more recent than the late 1980s.

Perhaps the biggest difference is that, in Wii Music, you aren’t using a few fake instruments like a guitar or drum set. You are instead manipulating the Wii controller to simulate one of many instruments depicted on screen. There’s even one “instrument” called Dog Suit — a dog suit that, when worn by a Mii, uses canine barks in place of notes. Another key difference is that, aside from one game, Wii never penalizes you for playing an incorrect note in a song, because you can’t play a bad note — every press of an imaginary key or strum of an invisible string plays the correct note.

A musically gifted group of Miis — on-screen personas representing players — demonstrate how to play various types of music and instruments.

This “no mistakes” environment is a little bit like a sports league in which every kid gets a trophy. Wii Music got a bit too saccharine at times, like when I scored a lousy 43 out of 100 points in a game and Sebastian Tute assured me that points didn’t much matter so long as I played the way I wanted to play. But for people who are learning about music and don’t want to worry so much about playing the right note, OK: Wii Music fosters a freedom to experiment with style by allowing users to improvise and explore variations of songs.

Outside of the Games section, you are the judge of your own performance, rating it however you see fit, or not at all. Wii Music is divided into Jam, Lessons, Videos and Games. My favorite section was Games, which included conducting a song in Mii Maestro, hitting the right note at just the right moment in Handbell Harmony and arranging Miis from lowest to highest note in Pitch Perfect.

The more activities I completed, the more instruments and songs were unlocked and available for me to use; off the shelf, each copy of Wii Music starts out with 27 instruments, but over 60 can be unlocked in the game. In Lessons, Sebastian Tute explained the importance of each instrument in a song and the role that it played. Before I played drums in a reggae song, he explained that reggae drums lay down an eight-beat rhythm. In the Japanese style of music, I learned how to play and recorded myself playing all four parts of a song: taiko drum, bells, shamisen, a three-string guitar-like instrument that puts bass in the song, and flute.

If you’d like, you can opt to save your performances as music videos when you’re finished. These include your mistakes — err, improvisations — and some other funny effects like views of the audience members as they bob their heads listening to you play “Twinkle, Twinkle, Little Star.” Album covers can be made for these videos, and the finished product can be sent to other friends’ Wiis if they also have Wii Music. Those friends can play over parts of your song and send the revised video back to you. While you’re playing songs, small black notes with faces on them called Be-Bops appear in the bottom right of the screen and work as a metronome would, steadily keeping the beat.

But cool accessories like guitars and microphones that are used to play music with other games aren’t available for Wii Music; instead, you must use your trusty Wii remote and Nunchuk to make one of four motions: piano-type, guitar-type, trumpet-type or violin-type. These four motions work to play a variety of instruments in different music styles, but some are easier to pretend to use than others.

While playing the imaginary trumpet I held the remote like one, pressing its 1 and 2 buttons like trumpet keys. But playing the piano uses the same motion as that which is used for playing drums — a downward hitting motion with the remote and Nunchuk — and this felt more like using a hammer than playing a piano. If you own a $90 Wii Balance Board, you can use it in drum mode in addition to the remote and Nunchuk. I tried this briefly, and it was fun to use the balance board in place of drum pedals.

Wii Music isn’t meant to replace a music lesson, but it’s intended to get people thinking about music and their own music style, without fear of making mistakes. It’s fun, unintimidating and will even teach you a thing or two. Just steer clear of the Dog Suit, if you can help it.

• Discuss: Share reviews of videogames and systems in Journal Community.

Edited by Walter S. Mossberg

• Mossberg Solution will return, Wednesday, Jan. 14. Email us at mossbergsolution@wsj.com. Find this and other columns and videos online free at the All Things Digital Web site: http://walt.allthingsd.com

The G1 is built around a model of openness, enabling developers to create applications — software programs, called “apps” for short — that will succeed or fail according to the feedback from the online community. Naturally, these community-contributed programs need a marketplace where G1 users can find them, and the Android Market provides just that.

This week, I installed various applications from the Android Market on a G1 and tested them out. Google (GOOG) says it will launch with around 40 to 50 applications in this virtual store, and these and all other apps will be available free of charge from now until at least the start of next year.

BreadCrumbz makes maps.

I found these apps to be useful, entertaining and mostly straightforward. There were a few that I felt tried to jam too much into one application, such as BreadCrumbz, an app that asks users to add pictures, instructional arrows and labels to maps that they make for friends. Other apps kept it short and sweet, like Wi-Fi Toggle — a one-touch button that turns wireless capability on or off to save battery power.

The G1’s apps are more utilitarian than most apps I’ve tested for Apple’s iPhone — and not quite as visually pleasing. I even compared one G1 program, Plusmo College Football, directly with the same app running on the iPhone, and I missed the artsy touches of the Apple (AAPL) version — like menus that flipped 180 degrees when selected rather than simply opening.

One downside: Only a measly 70 megabytes of internal flash memory are reserved on the G1 for storing these third-party applications. Once you fill that limited internal storage space, you have to delete some of your apps to add more. You can’t currently store apps on the phone’s roomier removable memory card. (A one-gigabyte microSD comes with the G1.) The iPhone doesn’t set such an arbitrary limit on application-storage space. The Android Market, like Apple’s iTunes, keeps a record of each user’s installed apps so they can be easily downloaded again later at no extra charge (if they carried a fee). But, unlike the iPhone, the G1 can’t back up your apps to a PC or Mac.

The G1’s open model means extra setup steps during app installation. For example, if an application will access certain information — such as a user’s Internet connection, location data (as identified by GPS) or other personal information (calendar, contacts, etc.) — warnings appear during installation, and the user must grant permission. In addition, many apps come with license agreements that must be okayed before users can continue. If something goes wrong with an app, people can post complaints on community boards or email developers, whose email addresses appear during installation.

The Android Market home page.

To offer a general idea of what’s available, I’ve highlighted a handful of apps that I like. I broke the applications into three groups: Functional, Fun (if occasionally kitschy) and Frills.

Functional

Wi-Fi Toggle: This does what it says. Once installed, it adds an icon to the G1’s desktop that provides a quick way to turn Wi-Fi on and off without digging into the settings menu.

Locale: Like Wi-Fi Toggle on steroids, this app allows a user to set up a G1 so it dynamically changes its settings in specific conditions. The settings can respond to calls from certain people or changes in the phone’s battery power, calendar, the user’s location or the time. For instance, the Wi-Fi can automatically turn off, ringer volume can go up or down, desktop wallpaper can change or a post can be sent. Just think of all the churchgoers who could ensure their cellphone ringers are turned off on Sunday mornings or when the church’s location is sensed.

Ringdroid: Make ringtones from your own songs by adjusting bars to mark the start and end of each ringtone. Hitting Save automatically keeps the ringtone, labeled with the song’s name by default, for use on the phone.

Video Player: The G1 doesn’t have a built-in way to play videos, and this app does the trick in a clear-cut, reliable way.

Fun

Movie ShowTimes: This lets people use a finger to flick across the G1’s touch screen to page through movie poster images, titles and brief descriptions. Below each movie description, an on-screen button labeled “Showtimes Near You” uses GPS to generate lists of nearby movie times.

Pac-Man: The classic arcade game never gets old. You can move Pac-Man through his maze with one of three methods: tilting the G1 so its accelerometer moves the Pac-Man, swiping with a finger to point Pac-Man in the right direction or using the trackball to move him around the screen. I preferred the trackball.

Cooking Capsules: This program demonstrates food-making without being either too intimidating or too dull and simplified. Though there were only six “capsules” when I tested it, each includes steps for watching (an instructional video), shopping (using an on-screen list of items) and cooking (with numbered instructions on how to cook the food).

Bonsai Blast is a gaming app that’s now available for the G1.

Bonsai Blast: This colorful, Asian-themed game directs people to shoot colorful marbles at other chains of marbles, with a goal of getting three matching marbles lined up beside one another so they’ll disappear.

Krystle II: Turns your G1’s entire screen into a picture of fur that purrs and vibrates as you touch it. There’s no real point, but Krystle II is addictive and strangely comforting during long conference calls.

Frills

Ecorio: This well-intended app aims to track users’ travel carbon footprints in order to make them more responsible for the environment. It asks users to enter things like recent transit routes and carpools and suggests ways to reduce and offset people’s footprints.

Maverick: An IM program that allows people to add scribbles, location data or even photos to active instant-messaging conversations. Maverick signs users into Google Talk and Picasa simultaneously, adding IM images into an auto-generated Picasa album for later viewing.

PicSay: Add word balloons, titles, props and effects to digital photos captured and/or stored on the G1, then send the images via multimedia messaging service or email, or save one as a caller ID.

There are many more G1 apps to try, and developers are expected to keep making them for this new device. As with the iPhone, apps obtained for the G1 from the Android Market enable it to morph into a different device with different tools every day.

– Edited by Walter S. Mossberg

• Email us at mossbergsolution@wsj.com. Find this and other columns and videos online free at the All Things Digital Web site: http://walt.allthingsd.com

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The Wii Balance Board measures shifting weight.

For the past eight days, I’ve been stretching, crunching, yoga-posing and even running using this $90 package from Nintendo (NTDOY.PK). Wii Fit is the title of the disc that comes with the Wii Balance Board, a sturdy platform on which you perform your routines. The two are used together for various types of yoga, strength training, aerobics and balance games, which involve the Wii game system’s “Miis” — on-screen representations of yourself — that interact with trainers and other virtual characters. Sensors in the Balance Board detect a user’s weight, body mass index, balancing skills and positioning during activities, and the Wii Fit program keeps track of this information, providing tips on technique or weight loss. Wii Fit and the Balance Board must be used with the original Wii system, which costs $250.

I’ve grown fond of using Wii Fit and the Balance Board because it holds me accountable for my weight and balance skills. I learned fitness and health tips from a small, animated image of the Balance Board that jumped around on-screen — such as the fact that people who cross their legs while sitting are more likely to have back problems. And after a few days of using the system, I could feel a difference in my muscles.

For those used to 30-to-40-minute workout sessions, the Wii Fit programs may seem lightweight, since activities last for only about three to five minutes each. To unlock longer activities or additional strength-training repetitions, you must first do them a handful of times in their short versions, which can be frustrating. Nintendo says this is designed so that average users don’t feel intimidated, but I felt like some of the activities ended just as I was getting into them. Almost all activities involve actually standing on or touching the board.

Motivation is a key element in the Wii Fit programs. An on-screen graph tracked my progress, and I “stamped” each calendar day to show that I had exercised. Each minute of activity added a point to my Fit Bank, and enough points unlocked new activities; Wii Fit includes over 40 altogether. On-screen instructors demonstrated and joined me during yoga and strength-training exercises, congratulating me when I held my balance or noting that I stopped mid-exercise.

A daily body test measured my weight and body mass index against those from previous days and challenged me to two short balance tests, which changed daily. After, I was told my Wii Fit Age, a number reached using my actual age, BMI and performance on the balance tests. On good days this number was a couple of years below my real age, but it drifted upward when I was given harder tests, sometimes reaching 13 years older than my actual age.

Top: Wii Fit charts fitness progress over time, including body mass index and weight. Yoga (middle) and balance games like Ski Slalom (bottom) mirror board movements.

More than one person can use the system and profiles can be password protected. Friends can use the Balance Board under someone else’s profile; the system notices weight changes and confirms that it’s alright to continue.

The Balance Board measures roughly the size of a step used in step aerobics classes, and uses the same technology that gauges the weight of airplanes. These sensors expand and contract when someone stands on the board, measuring weight, and where and how that weight is shifting on the board. This works out of the box with four included AA batteries. Its power button can be nudged on with a foot, turning off automatically after five minutes of non-use.

I started with basic yoga, attempting the half-moon pose. I opted for a male instructor who told me that this position helped improve posture and digestion. He briefly demonstrated the position, and we got started on the actual session, which lasted two minutes. A large, on-screen circle that expanded and contracted illustrated when I should inhale and exhale as I held positions. I tried the Warrior, Tree and Sun Salutation positions throughout the week.

In the strength-training section of the program, I liked the Single-Leg Stretch exercise, which involved standing on the Balance Board on one leg and holding the other leg off the ground, bent up toward my chest. I slowly extended this bent leg out and in, while moving my arms and trying to maintain my center of balance. This exercise started at six repetitions, but increased to 10 reps as I improved; 20 reps are the maximum.

I tried the Torso Twists and Rowing Squats, but had a lot of trouble with Push Ups and Side Planks (modified push-ups), because I’m not good at push-ups. To my surprise, my trainer didn’t notice when I couldn’t finish the session. I got my best score on that exercise, clearly a flaw in the system.

During yoga and strength-training exercises, an on-screen red dot marked where my center of balance was detected, and I was encouraged to try to keep that dot within a highlighted area. After the exercise, a diagram showed where my weight had shifted, and I earned better rankings when I distributed weight evenly.

Aerobics were more fun, including hula hooping. I rotated my hips and I leaned forward so that my on-screen cartoon self could catch hoops thrown over my head by other characters. The Balance Board tracked the number of times I rotated my waist around in a circle. One aerobics activity that didn’t use the board was Basic Run, which requires users to put the Wii remote in a pocket or hold it while running in place for time intervals measuring three, five or 10 minutes depending on the pace. This mode is designed so users can either watch other runners on-screen or tune into television while running as Wii Fit tracks your progress. An aerobics activity called Basic Step was like Dance Dance Revolution: on-screen footprints showed where and how to step next — on and off the board.

Balance Games were fun — but hard. I tried a bunch, including Soccer Heading (where you pretend you’re the goalie), Ski Slalom and Tightrope Walk, and was surprised by the sensitivity of the Balance Board. But the more I played, the better I became at controlling my balance.

I brought the Wii and Balance Board with me to my parents’ house last weekend, but most people will do best to keep this board in one place since it weighs 10 pounds.

When I stepped onto the Balance Board at my parents’ house in a room with wall-to-wall carpeting, the system thought I had lost 13.4 pounds since the day before. I stepped off and tried this measurement again a few minutes later, but was told I lost another 4.6 pounds. However, when I returned to my own home with the board on an area rug on hardwood flooring, the system showed I “gained” 16.1 pounds. My weight at my own house was on the mark.

Some of my relatives jokingly saw this instant weight loss as a reason to buy a Balance Board, but this made me question the system’s accuracy.

Nintendo solved the mystery: The carpeting in my parents’ house, which I mistakenly thought was similar to the area rug in my house, must have been touching the bottom of the board, therefore transferring my weight onto the carpet and away from the board. Four circular “feet” come with the Balance Board to elevate it, solving the problem.

When the Wii Fit system thought I lost or gained a lot of weight in one day, it was concerned and offered tips for healthier fitness. In the case of the supposed weight gain, I was asked to think about why I might have gained weight, then had to select an answer from a list of reasons why, including Late Dinners, Night Snacking and Not Exercising. The system gave health tips related to the reasons.

Users’ outside exercise can be accounted for in the system. I added the time I spend playing tennis each week and this information plugged into a graph to illustrate fitness activity over time.

The idea of having a virtual trainer and a way to set weight-loss goals while tracking progress could be truly valuable for people in need of motivation without the expense and/or hassle of going to a gym. If you’re looking for a fun way to get in shape, the Balance Board will do the trick. Like the Wii, its activities encourage all sorts of people to use it, marking yet another smart move from Nintendo.

• Email mossbergsolution@wsj.com

The world of computer gaming is often associated with “gamers” — mostly men who invest in special controllers, giant monitors and subwoofers for use with violent action games. But a different type of gaming, “casual gaming,” is becoming popular with a different type of user, mainly middle-age women.

Casual games include puzzles, card and arcade games and don’t require hours of play in order to understand how they work or which computer buttons will do what. The game industry sees the casual gamer as a growing market and believes it mainly consists of women over 35.

A character from \”Mystery Case Files — Prime Suspects\”

This week we tested an online gaming service from Big Fish Games Inc., which, since 2002, has specialized in selling downloadable casual games that are family friendly. It now offers more than 300 games through its Web site (www.bigfishgames.com) that are broken down into categories like Puzzle Games, Card & Board and Action & Arcade.

Big Fish isn’t the only player in casual gaming. The leader is generally thought to be RealNetworks’ RealArcade, which we’ve reviewed in the past, and Microsoft and Yahoo also offer casual games. But Big Fish provides an interesting twist — a sort of multilevel marketing scheme where you can earn money for getting your friends to buy games.

In general, we liked Big Fish, which allows you to download a free 60-minute trial of a game to see if you like it enough to buy it. After the trial, you must pay $20 to download the full version of a game. The BigFishGames.com site itself, where users select and download the games, is rather straightforward, offering a variety of fun titles that kept us distracted for hours.

But two other sections of the service — one called My Big Fish Games and another section for online game-playing — each require their own sets of log-in information, totaling three possible log-ins in Big Fish Games. This makes for some unnecessarily confusing navigation around the three sections of this product.

Big Fish Games lets you set up your own Web site with reviews of games that you can share with friends.

We started on the basic site, BigFishGames.com, and right away we appreciated the inviting and colorful environment. Even someone without any online gaming experience would understand how to begin playing a game seconds after logging on by choosing from organized categories like genre, new releases, featured areas or top 10 downloaded games. Games are offered for both Windows and Mac operating systems, though not as many are available for use on Macs.

The Mac games looked and worked fine, but they caused other open windows on the Mac to become reduced in size, something we had to manually correct when we were done with the game.

A discount subscription service called Game Club offers games for less than the usual $20 fee when you sign up to buy a certain number of games per month, such as $7 each if you buy 12 games in 12 months. Using Game Club requires an email address and password.

A link within the BigFishGames.com page directs you to a second Web site called My.BigFishGames.com. Here, you can sign into yet another account by entering your email and password to create your own personal Web page with a welcome message for friends, a list of your top five favorite games and your own reviews of the games.

This personal Web site can be shared with friends and comes in handy when using the Big Fish Games referral reward program, which the company introduced last week. Though not everyone will be willing to solicit their friends, this idea might earn you a few bucks.

This rewards program works when you tell friends about the site and they purchase a game, giving you 25% of that purchase from Big Fish Games. If the friend refers someone else to the site who also buys a game, you and the friend who did the referring each get 25% of that third party’s purchase. There’s no limit to the number of people that this chain can reach, earning you more and more money.

Your monetary award can be sent to you as a check, or it can be used to double your money for use when buying games (a $5 kickback becomes $10 that can go toward games). If you don’t want to receive the money, you’ll be able to donate it to charity starting in October.

If you’d rather play games online instead of downloading them on the BigFishGames.com site, a Play Online tab in that site shows you which games are available for online play. All of these games can be played free in a browser window, but if you’d like to be able to chat with the online gaming community, you must create yet another log-in with a username and password. This third set of Big Fish Games log-in credentials lets others see your username so they can interact with you.

After browsing around and dealing with all of these navigational headaches, we found that the games themselves were really entertaining. The first two games that we downloaded in 60-minute trial versions were about retrieving hidden objects in cluttered pictures — adult, computerized versions of the common picture puzzles found in kids’ magazines. We liked one called “Mystery Case Files — Prime Suspects” enough to buy its full version, which took about 10 minutes to download.

A Big Fish game called \”Hidden Expedition: Titanic\” challenges players to find hidden objects in various room of the Titanic.

Katie nostalgically remembered her elementary-school days when she came across a mystery game called “Nancy Drew — Last Train to Blue Moon Canyon.” This game, a huge 850-megabyte file, isn’t available in trial version, but Katie got it anyway and was hooked on its impressive graphics, amusing characters and cheesy story line.

Smaller downloads like Boggle Supreme and Mahjong Towers Eternity also proved satisfying. In the Mahjong game, you can select from numerous tile layouts created by other Big Fish users.

We tried our hand at online gaming with a takeoff on “Wheel of Fortune,” called “Pat Sajak’s Lucky Letters.” Pat’s voice could be heard narrating the rules as we played.

One game called Cake Mania was categorized in the Action & Arcade section of games. The goal of this game is to help the main character bake as many cakes as possible in a certain amount of time — quite a switch from typical action games that would more likely involve traversing minefields and shooting enemies.

But because of the three sections within Big Fish Games, it was hard to remember where we had seen a game that looked interesting to us — on the basic page of games, in the online gaming section or on our own Web page of recommendations.

Big Fish Games says it will offer a unified log-in system in three to four months that will enable you to use just one log-in for all three sections, which is a relief. Until then, things can get confusing on this site. But if you can keep your credentials straight, the games can be a lot of fun without requiring much skill. And if you have friends who agree, you might just make a buck or two through this game Web site.

Email: MossbergSolution@wsj.com.