This is the most addictive game ever. It is playing with straws and motors. It takes a lot of skill and practice, but it is awesome. Click on the sodazoo to view all the stuff that people have made.

http://sodaplay.com/constructor/index.htm

yeah man we used to have that on the school network and it ruled!
sorta.
but i could never make anything good with out it falling apart.

Quite interesting! Very amusing.