Scratch - Scratch is the programming language & online community where young people create stories, games, & animations.
GIMP - GIMP is a multiplatform photo manipulation tool.
GCompris - Educational Game for Children 2 to 10 years old.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.