Carl Orff was a German composer, best known for Carmina Burana. He also developed a system called Orff Schulwerk. It is a way to teach and learn music specifically designed for children.
It is based on things children like to do: sing, chant rhymes, clap, dance, and keep a beat on anything near at hand. These instincts are directed into learning music by hearing and making music first, then reading and writing it later. This is the same way we all learned our language.
Orff Schulwerk uses poems, rhymes, games, songs, and dances as examples and basic materials. These may be traditional or original. Spoken or sung, they may be accompanied by clapping and stamping or by drums, sticks, and bells. The special Orff melody instruments include wooden xylophones and metal glockenspiels that offer good sound immediately. Played together as in a small orchestra, their use helps children become sensitive listeners and considerate participants.