These rings can be stacked on the pole and if flipped in the correct direction they levitate. This toy builds intuition for how magnets behave.
This toy is takes advantage of the polarity of magnets. Like poles repel each other, and opposite poles attract.
The biggest cost in this toy are the magnets everything else is simple plastic and will be cheap to make. The rings are very safe because there are no small pieces to swallow and there are no sharp edges anywhere on this toy. This toy is also very durable because there are no moving parts.
Rapid Prototype Design
Carnegie Mellon University
January 23, 2007