Yoshihito's book contains just the one design, but I found a couple others online. One is a wobble robot (left pix). It's wheels are kind of caty-wompus so the robot wobbles back and forth as it goes forward. The other is a bird. I was a bit disappointed in this bird. It's wings flap up and down, but it's not driven by the motor. You have to push the bird's tail up and down to get the wings to flap. I'll have to work on the design, because it would be a lot more fun if the motor made the wings flap.
