Abstract
The research focuses on the effective use of music and rhythm to support a child with autism with communication and interpersonal relationship problems. In order to understand the autistic child's development through music activities, Jean Piaget's theory of ten stages of moral development were employed, and categorized in listening, moving, operating, and singing, and interaction with people to construct a "process scale of infant development through musical activities." Changes appeared in the musical activities in the child with autism were indicated in a radar chart. This process was practiced with the collaboration of an individual who received professional training who made the musical activity programs for the child. Therefore, it is important for a teacher/caregiver to be conscious of these stages to help the development of the child with autism.