Check out this disco ball, it is powered by a CD player motor. Similar to this one, but spins by itself.
“Here is my version of the LED Disco Ball. Its Completely portable can either be hung or screwed to the roof. It runs on 3AA batteries and has a group of gears from a CD player laser.
-Metal Fujicolor Negative Film Control Strips Container
-2 UV LEDs
-2 White LEDs
-2 Blue LEDs
-Motor + Gear system from a CD player