Wheels for Cubelets modular robot

UPDATE: Check out the new improved version here: http://www.thingiverse.com/thing:1421337 - it includes an option for free spinning wheels that attach to any Cubelet.

These are magnetically attachable wheels for the [Cubelets](http://www.modrobotics.com/cubelets/) system from [Modular Robotics](http://www.modrobotics.com), a construction system for quickly building robots. They are designed to attach to the "Rotate" Cubelet to give robots greater mobility. You will need to reprogram the Cubel