1. Rhythm cornerstone: This is one of the most basic elements in Orff's music education system and the core of Orff's tree. Rhythm cornerstone refers to a simple rhythm pattern composed of letters, numbers and symbols, which is used to help children master the basic sense of rhythm and beat.

2. Voice games: There are many games played by voice in Orff Tree, such as singing, reading nursery rhymes and telling stories. Games can help children develop their language ability and musical expression.