This is a rotating platform I have made for displaying models.

It uses a DC motor and 2 AA batteries to spin a platform, and urn it on and off with the switch.

The motor I used: Gebildet 4Pcs DC3V-12V DC Geared Motor for Aircraft Toys, Four-Wheel Drive Toy Car, Robotic Body

I also used this battery holders that are mounted in the brakets so they do't move

Hope it helps!