Everynow and then you need a turntable - not for a car or for a major, but for something small and low tech - like to make an a small object spin. While creating a small turntable isn't difficult, you don't always need to recreate the wheel either. (My apologies, the bad pun was entirely intended!)
A few I have come across during my last look:
Vue-More has a variety of small turntables and sign rotators.
Dino Rentos Studios has a variety of display turntables as well.
Turntable 360 has, you guessed, it - turntables. Small, for displays.
Young Electro-Mechanical Company has "motiondiser" turntables, they are small but have a high loading capacity.
Of these I have used both the Vue-More and the the "motiondiser". The vue more was not very functional, but it was undersized for the application (provided by the artist for a sculpture. The motionsiser is a fairly small little robust piece that will probably work as long as you can plug in a standard plug. The unit has to be at least 10 years old - maybe 15, and spins happily away.