A boomerang is an instrument used for multiple purposes. It is primarily associated with the Aborigines of Australia.
Boomerangs ae available in various shapes and sizes largely depending on their geographic/tribal origins and intended function. The most common is the returning boomerang, that travels in a curved path and returns to its point of origin. Other types are of the non-returning ones, infact few are not even thrown but are carried for hand-to-hand combat.
They can be also be used as hunting weapons, musical instruments, battle clubs, fire-starters, decoys for hunting waterfowl, and as recreational play toys. Boomerang may be as small as 10 cm from tip-to-tip, and can extend over 2 meters in length. Tribal boomerangs are generally inscribed and/or painted with designs. Majority of the boomerangs found today are for the tourists or competitions, and are of the returning type.
Boomerang is probably the first heavier-than-air flying eqquipment ever invented by human beings. The oldest boomerangs are ten thousand years old. A boomerang that was discovered in a Carpathian cave in the was made of mammoth's tusk and is believed, to be about 30,000 years old.
Though no one knows for sure how the returning boomerang was invented, but some modern boomerang makers speculate that it developed from the flattened throwing stick.