Wind instruments are instruments that a make a sound by blowing into them. They are found in many cultures across the world. Originally, wind instruments would have been made from locally available materials such as bones, shells and hollow wood that could be blown into, but wind instruments are often now made to very precise designs from wood or metal, or a combination of both. In the Western tradition, wind instruments can be divided into woodwind and brass. Woodwind instruments include clarinets, flutes, oboes, bassoons saxophones and recorders. Brass instruments include trumpets, horns, trombones, euphoniums and tubas.