Ive been thinking of using some of these cell vibe motors to make a pic into a tiny car where the chip is the body of the car. If it was one with a timer it could be done almost with just a couple button cells and the motors since this motor can run off the current an MCU can supply, you wouldn't even need an H bridge. If you used one of the specialized RF receiver programmable micro controllers, maybe you could make a remote control chip that drives around!