here I'll show you how to make a tooth brush robot out of a few simple pieces, I know theres been a lot of other ible's of the same thing but mine is a bit different and can be charged over and over. this is my own design of this robot, you need:
-Mini vibration motor
-Tooth brush head
Step 1: The Set Up
First you are going to wire everything up. I just soldered the motor onto the capacitor, but id you dont have a capacitor then connect the motor to a small battery. you can also add a switch if you want.