Take your chances on the free falling power tower. The power tower here is a 8 Minifigure ride that is controlled by a switch on the back of the model. In front of the power tower there is a ticket both, a chicken stand, a ball toss game, and a stage.
The reason I built the power tower is because I like rides a lot and I have always have wanted to build a moving model. I think it would be a good LEGO set because the power tower itself was fun to build and play with, and there is a lot of fun smaller things around the power tower like the ball toss game.