Algodoo

Two simplistic ideas in one. First, on the right side, there are 3 towers with spaces in between them. Move the car over on top of them, and steer them into the spaces. I set each tower side to either a high friction or a low friction, so that the wheels will ride up the high friction side while sliding past the other side. The structure to the left is a makeshift ring (you can make your own if you like to make it better). Place the car half in and half out of the ring, turn gravity off, and then drive around the ring. Kind of fun to just mess around with, and you can turn the concept into a course.