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. With Orff Schulwerk, improvisation and composition start students on a lifetime of knowledge and pleasure through personal musical experience. Learning is meaningful only if it brings satisfaction to the learner, and satisfaction arises from the ability to use acquired knowledge for the purpose of creating. For both teacher and student, Orff Schulwerk is a theme with endless variation.