Tux Paint -
http://tuxpaint.org/This is a graphical image creating program where kids can color, make shapes, and explore their imagination! I highly recommend it, it is a lot of fun!
Childs Play -
http://childsplay.sourceforge.net/This is a suite of education games for children. It involves puzzle games, and games that help with memory, spelling, math, etc. Check it out, it includes lots of great stuff!
Asymptopia Software -
http://www.asymptopia.org/Includes lots of free education software! Lots of math and spelling related games.
StepMania
http://www.stepmania.com/wiki/DownloadsI haven't explored this software much but it is somewhat like dance dance revolution. Kids can download music and try to dance to the beat.
