Ahh haha my friend! lol...I have a way to make it spin! The main support would be the base thingy in the middle (like the silver one Spaceship Earth has)...it would be built into this strong concrete support underground that has some kind of rotation device, allowing the support to support AND rotate and the same time (This wouldn't power the rotation). In the three side/diagonal supports, they wouldn't really support it quite as much as the middle one would. Each of these would be fit with gears and tires (or whatever) that would all turn the same direction, pushing on the globe and making it rotate. These would power the rotation while partially supporting it at the same time. If needed, there could be four of these. If you need a diagram, I'd be happy to make one!