Musical instruments and musical expression take an almost infinite variety of forms throughout the world. This is especially true in Oceania, whose more than 1,800 different peoples create an astonishing variety of musical instruments. Made and used throughout the Pacific, musical instruments play integral roles in contexts ranging from religious rites to secular entertainment. Oceanic musical instruments include many of the broad categories familiar in the West, such as percussion, wind, and string instruments, as well as forms that are distinctive to the region. These vary from familiar types such as drums, flutes, and the Hawaiian 'ukulele to unusual forms such as slit gongs and bullroarers.