Motorized Rotating Platform/Turntable with Optional Slip Ring https://www.youtube.com/watch?v=pLvE5WdoyN4

This is an 8" diameter rotating platform (or turntable). The platform can rotate under its own power for display purposes using a small gearmotor. It also has facility for inclusion of a slip ring that lets you route electric power to whatever is on the platform, such as lights, without worry about wires tangling.