"I want to play now." "It's my turn." "You're hogging the computer. It's not fair." Probably every teacher has heard these refrains. Sometimes children have a hard time sharing the computer with friends. After all, in most cases, there is only one mouse. However, a number of programs foster cooperation and sharingand thus promote social development as well. The following are some of the best on the market.

Sesame Street's Music Maker

(Ages 3-6) musical sounds, songs

This set of eight activities, which encourages children to gather 'round the computer and sing along with Ernie, Elmo, Grover, and Cookie Monster, is great for group sing-alongs. In one activity, preschoolers can create their own tunes by placing instruments in a sequence of squares and pressing a "play" button. The activities are all open-ended, and the scenes to explore seem endless, offering a nice introduction to music and environmental sounds. Mattel Media, Inc., 888-628-8359; www.mattelmedia.com; Windows/Mac; $19.95.

Easy-Bake Kitchen

(Ages 3-6) cooperation, following directions

This colorful playset attaches onto your keyboard to turn your computer into a little kitchen, complete with measuring cup, mixed oven door, and baker's tools. The plastic playset attaches to a Windows-based computer keyboard with an elastic strap. As children manipulate objects on the playset, signals are sent to the computer to make things happen onscreen. There are many opportunities for sharing as players work with the tools to decorate their creations with letters, shapes, and animals. While it's tough to compete with the experience of real, live baking, this playset offers a fun, mess-free alternative that children love to share. Hasbro Interactive, 800-683-5847; www.hasbro-interactive.com; Windows; $39.95.

Blue's Treasure Hunt

(Ages 3-6) cooperation, problem solving

This scavenger hunt works well as a shared experience. Children need to help Steve and Blue as they look for treasure somewhere in a house, school, and park. Blue is adorable, as usual, and the program's graphics and animation rival those of the television show. As children travel about, they'll come across activities that involve helping the characters. For instance, they'll recycle trash in a sorting game and gather fall leaves according to color Items are collected along the way that may prove useful later on. Humongous Entertainment, 800-4998386; www.humongous.com; Windows/ Mac; $29.95.

Fisher - Price Rescue Heroes: Hurricane Havoc

(Ages 4-7) cooperation, problem solving

The five activities on this CD-ROM, based on the Fisher-Price Rescue Heroes figures, provide plenty of opportunities for cooperation. As children perform all kinds of heroic tasks-gabbing pets from a burning building, putting out fires by helicopter and smashing down roadblocks to keep the streets safe-they'll want to consult friends and even take turns ("You be Wendy Waters; I'll be Billy Blazes"). The Learning Company, 800-716-8506; ww.learningco.com; Windows/Mac; $19.95.

Bear in the Big Blue House: Bear's Sense of Adventure

(Ages 3-6) matching, colors

In this program based on the Bear in the Big Blue House television show, players will find an engaging set of activities and adventuresall of which involve helping others and encourage side-by-side play. There are five adventures, which makes the program rich in content. Graphics are great, and among learning concepts touched upon are the five senses, color mixing, and matching by attribute. Knowledge Adventure, 800542-4240; www.knowledgeadventure. com; Windows/Mac; $30.

Also remember: Two programs we have reviewed during the past 12 months-Freddi Fish 4: The Case of the Hogfish Rustlers of Briny Gulch and PuttPutt- Enters the Race (Humongous Entertainment, 800-499-8386; www. humongous.com;Windows(Mac; $29.95 each, ages 3-8)-are great for sharing. As with any scavenger hunt-style software, these tides prove that sometimes two heads are better than one. Both are also loaded with nicely designed puzzles that get children thinking. We've seen small groups of children gather around the computer, some even taking notes, in order to solve the mysteries.