4volt Jansen Walker Beta 1 from a3o Studios on Vimeo.
Take a look at the Jansen walker, a laser cut robot built out of plastic and some spare nuts and bolts that were lying around. OK, and maybe an Arduino CPU. You too can build one of these, all you have to do is buy the parts, and assemble it. Oh, and program that CPU using the servo code that you can download.
Based off of Theo Jansen’s gearing mechanism, it’s an interesting experiment in engineering.