The Hula-Hoop is one of the most famous toys in history, but the science behind it has gotten little attention. Some of us are master twirlers, while others can't manage more than one spin. So how do Hula-Hoops keep from falling down as they are whirling, and why are some of us better at it than others?
Modern Hula-Hoops are plastic rings you twirl around your body by moving your hips. This swiveling motion is similar to that seen in the Hawaiian dance known as the hula (hence the name).
