How to Build a Rubber Band Motor
- 1). Pinch the rubber band between your fingers and insert it into the hole in the spool. Make sure the rubber band is sticking out of both sides of the spool.
- 2). Thread the paper clip through one end of the rubber band and tape the clip to the side of the spool.
- 3). Put the other end of the rubber band through the washer.
- 4). Insert the cotton swab into the loop of rubber band sticking out of the washer.
- 5). Twirl the cotton swab around and around until the rubber band becomes very taut.
- 6). Let go of the rubber band and the swab to see your motor run.
Source...