A boomerang is a throwing object with a curved shape (an open flat V or a cross) used as a weapon or for sport.
When thrown, the boomerang will first fly forward, spinning as it goes. Then it will turn around in the air and come back to the thrower.
A skillful thrower can make his boomerang do many stunts. He can make it bounce off the ground several times before it rises into the air and starts back. He can make it loop-the-loop several times. He can even make it turn in a figure-eight in the air
A boomerang is simply a curved club. But it must be curved in exactly the right way. It must be curved so that the air pushing against it will make it do its stunts. Some boomerangs are carved from small trees which already have a good bend. It may be at a place where a branch joins the trunk. Some boomerangs are made from straight pieces of wood that are first soaked in water and then bent into shape.
There are also boomerangs that do not return to the thrower. These are rather heavy and are almost straight. They make better weapons, but they are not as inter-esting to watch.