The impossible balancer is precision machined from a solid block of aluminium. Pick it up by its “stalk” and spin it with your thumb and fingers. The impossible balancer will start tipping to one side and it will eventually reach a point where it flips the other way and starts spinning on its “stalk”. If you spin this on a very polished service it will continue to spin for minuets. Listen to the sound changing as it flips onto its end.