(Maybe it works on toddlers too?) Sometimes after spin stabilization, you need to despin, and that's where the yo-yo comes in. The Yo-Yo De-Spin mechanism involves deploying small masses which ...

A new Yo-Yo World Champion has been crowned in Prague, and this year's winner was a 17-year-old from Chico, Calif. (first spotted on Gizmodo). As you can see from Stein's winning freestyle (video ...