In Asia, there are special competitions where kites have complex designs and are equipped witth instruments such andas whistlas that make musical sounds as the wind blows through them.Although all kites have a similarstructure, the variety of shapes is almost andless. The size of the kitea also varies greatly - some are so large that several people are needed to control them.Kite-fighting contests are also held, in which competitors use their kites to attack and bing down their opponent's kites or cut thier strings.