Make science fun with Bristlebots: small robots made by combining a toothbrush head and vibrating motor. By changing the position of the pipe cleaner arms, Bristlebots will travel in circles, straight lines, or scoot around randomly. Bristlebots are great for teaching engineering, motors, circuits, and principles of balance. Best of all, they don't require tools to build! The toothbrush head comes pre-cut, and the motor wires have exposed ends to connect to the battery. Instruction manual available for download.