In the morning, they are either working on rapid vertical mobility devises or researching at a physics lab. In the afternoon, it’s juggling diabolos and knives at Faneuil Hall, then packing up their ...

Diabolo is always made of wood or bamboo and is hollow in the center. By juggling diabolo on ropes, the high-speed rotating diabolo will make a sound. Playing diabolo is a very interesting folk game, ...