Floating PC mouse..... If move both mouse wheels with el. motor, mouse can move forward, left and right.

Make a wunderful toy for your kids from retired mouse scrolling well.

Not BEAM Robotics, not Solarbotics, I had no little motor I made a simple without electronics robot , with more powerful DC motor . Such robot can be made by everybody. Motor will rotate with different speed if every motor's axis will have different diameter.

The "BEAM Stepper" motor author Duane C Johnson and Wilf Rigter have beendone by following: it was taken chip dip socket with 74AC240 and added one more 74AC240 . The it is possible to use stepper motor from floppy 12 ohms. The "BEAM Stepper" rotates CD disc.
Construction called "dead beetle" with Assembly is done the microchip socket.