Let's Make Robots!

omnibot robot

Omnibot mk1 by Michal Zalewski

I came across a cool design for a robot that can turn it's wheels at the same time to turn in place or drive sideways. Take a look here:

http://lcamtuf.coredump.cx/omni/

The guy made molds for planetary gearboxes, levers, wheels and motor mounts. Here is an image: