Free Children's Software: Tux Paint

There is a great free computer paint program available at tuxpaint.org. The site describes the program this way:

Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6 in the US, key stages 1 & 2 in the UK). It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who guides children as they use the program.