Mr Yoshi Akai built a pretty awesome Lego sequencer which to get working in itself is an amazing feat but it goes even deeper. The different coloured Lego pieces each have their own sound and the higher the Legos stack, the more complex the sound. There are many more music related instuments on his website. Now Mr. Akai just needs to provide us with some step-by-step instructions on how we can create our own Lego sequencer at home.
More @ Yoshi AKAI.