The flying of giant kites called Wau is a popular pastime especially in the East Coast of Peninsular Malaysia. Used as decorative pieces or in competitions, they have intricate patterns that take weeks to construct and decorate. It was mentioned as being in existence during the early days of the Melaka Sultanate. The kites come in all shapes and sizes and are decorated with colourful paper and strands of thread. Sometimes a bow-shaped device is attached to the kite to give a high-pitched humming sound when flown.