Orff believes that the first element of music creation is rhythm rather than melody. He emphasized that music education should start with rhythm and cultivate children's sense of rhythm through the combination of rhythm, language and action. So in Orff's music activities, there will be a variety of musical instruments and maps. Atlas is divided into symbol atlas, rhythm atlas and figure atlas. For example, the "Picking Fruits" atlas allows children to feel the changes of notes more intuitively through the size of apples.