I've recently been spending more time on 3D design, and I'm really proud of this model. I'd love to see others having as much fun with this as I have! Basically it is a horizontal spinning top which has magnets in the shaft (inserted during pauses in the profile), and magnets in the posts in the base, configured in a way that makes the shaft "float" on the magnetic field and just gently push into the post on the right. This gives it very low friction meaning it can spin for a very long time.