Powerballs Powerballs. A co-worker introduced me to the world of Powerballs. What is it? It's a hand gyro. I guess you'd call it a toy or a gadget. It features an RPM guage that will indicate how fast you were able to make it spin. The world record is over 16,000 RPM. So far, I've only been able to get it up to 9,700 RPM. Supposedly it's also good for you. It takes a little practice, but give it a try if you can get your hands on one. Enter the Promo Code PCGameworld to receive a 25% discount.