Many great toys come in small packages and this product is no exception. Specially designed ball-bearings make the action of this unique toy possible. It's a combination yo-yo, juggling ball, and lasso. One ball is held and the other two balls orbit. The balls can move in vertical, horizonal or figure 8 orbits. It is possible to do juggling tricks by throwing it in the air and catching it. The designer has a Ph.D. in theoretical physics, has taught and is a science consultant. He designed it as an opportunity to teach basic physics to children in a new and innovative way. The motion is like perfectly circulating molecules, or the orbiting moon. There is also a glow-in-the-dark model. A truly new classic toy. This is a product now available in science museums throughout the country.