Play with physics
Seriously, it is a ton of fun.
Check out this dry run of a program that lets your drawings behave as if they were physical objects. Wicked cool! There are a bunch of versions of this out there floating around, this is the first one I’ve happened upon.
Edited to add: A cool, more-of-a-game version of this for PC exists thanks to this fine gent, who has a supercool blog:

[...] sr6622: [...]
EquMath: Math Lessons » Blog Archive » Play with physics said this on January 6, 2008 at 4:58 pm |