"GCompris is a suite of educational games and activities for children aged anywhere from 2 to 10. Areas of learning include computer discovery, algebra, science, geography, reading, and more. Childsplay is a similar game suite, with two built-in activities, a memory and a typing game.You can download more games for this suite on their plug-ins page.
"Tux, of Math Command (TuxMath for short) is an educational arcade-type game starring Tux, the Linux mascot! The player must solve the math problems that drop down before they pass up Tux, as Figure 1 shows, by entering in the correct answers; see Figure 1 for an example. Players can choose to play in the Math Command Training Academy, where he or she can choose from over 50 types of math problems, from simple addition to multiplication and division of negative numbers. Players can alternatively choose the Arcade mode to be presented with a variety of problems based upon the level they choose. In addition, you can even build your own custom games. TuxMath is a great, fun, game that can help even adults build up their math skills."
