5K40.u4 - Simple Screw and Battery Motor
Simple components produce rapid spinning in a screw.
The screw, magnet and wire all conduct electricity and complete a circuit with the battery. The magnet is free to move because the screw can freely pivot on the battery. When you touch the wire to the magnet and current flows, it induces a magnetic field around the wire. This field acts on the magnet, causing it to spin.
If you flip the magnet, it will spin in the opposite direction.