GCompris - Educational Game for Children 2 to 10 years old.
I Know It - "I Know It" is an online game for practicing primary-level math concepts.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
Etoys - Etoys is an educational tool for teaching children powerful ideas in compelling ways.
Scheduled tasks - GNOME GUI for configuring a users' cron (automatic jobs). Some of its features are:
Painty - Kid, if you have a dream to paint the best picture in the whole world, this is the place to start...