K&J Magnets experiments with replacing the spring in a Pogo Stick with repelling magnets. It kind of works albeit it seems that magnets don't make for good springs.
We receive quite a few questions about replacing compression springs with repelling magnets. Is it possible? Can it be done? What magnets should be used to replace a given spring?
It’s possible, but tricky. Magnets aren’t a one-to-one replacement – magnets behave differently than springs.