In Asia, there are special competitions where kites have complex designs and are equipped with 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.