Mechanisms/Gears!

Everyone that wants to create gear boxes similar to what we dissected the other day, here is a GREAT  place to get started:

http://flying-pig.co.uk/mechanisms/index.html

Also, you might wanna look into buying a lego mindstorm set from the Lego educational site, here's a link

http://www.legoeducation.com/store/detail.aspx?KeyWords=gears&by=20&ID=340&c=0&t=0&l=0

This has everythign you need to create really cool stuff, basically you just attach a main gear to a servo or DC motor and use that to control everything

-Steve