A microwave motor may work well. If you spin one round and poke your fingers on the terminals you get a reasonable shock, which is quite entertaining.

A cheap (i.e. 2nd hand) drill should also work without requiring much gearing.

Quote Originally Posted by Clive S View Post
Wal how about a small stepper motor. ..Clive
Stepper motor are good (ish) when you need to control position, but for spinning things in general you're better off with other motor types as they're a lot more efficient and simpler to drive, so should be cheaper.