Perpetual motion
What about it?
This started as me testing how fast I could spin this platform but accidentally stumbled across a perpetual motion machine.
Parts:
1) 1 crate
2) 1 steering stick
3) 1 small wheel
Attach them to one of the prongs of the turntable in that order (ie. Crate in the middle)
Get on the steering stick then get off again. The turntable will move indefinitely by itself.