The Comet Boomerang is one of our most exciting new product introductions. They are designed for right handed throwing only with a radius of 10-15 feet. You can throw them indoor or outdoor but low wind conditions are best. Even a small kid has the arm strength to throw and catch a comet boomerang and they are soft enough to use indoor without hurting the walls or furniture. It may be possible to knock over something but it would be unlikely as they are so light and are made from soft foam. Most importantly, they work great and are a lot of fun.