A friend and I built the MIBO, a Lego Mindstorms version of the Sony AIBO robotic dog.  It was designed by Jin Sato, and instructions can be found in his book: Jin Sato's Lego Mindstorms: The Master's Technique . Here are pictures of it after construction:

OK MIBO, show us your tricks.


How color coordinated we are... not.


Same view, with softer light


What a cute little doggie


Close-up of the gears and construction