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Watch a small Quicktime movie [604kB].

I rediscovered my stash of LEGO bricks and quickly set to building!

I've helped a number of people build their own version of an infinite marble-rolling machine, so I finally decided to make one of my own. The idea is fairly simple - the marble rolls down, a scooper picks it up, the marble rolls down again...

This uses a Cricket to control a LEGO motor, and two simple touch sensors. However, you could easily do the same with a LEGO Mindstorms.