GCompris - Educational Game for Children 2 to 10 years old.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
Painty - Kid, if you have a dream to paint the best picture in the whole world, this is the place to start...
TuxMath (Tux of Math Command) - Tux, of Math Command, AKA TuxMath, lets kids hone their arithmetic skills while they defend...
Lil' Picasso - Lil Picasso is a coloring and creativity package for children.
Get Sudoku - Get Sudoku is an interactive sudoku solver.