If you stand up, drums, if you lie down, rollers! You can play with 2 WAY, even if you are sitting or yes. When playing drums and playing it is a great music & light up. If you roll it and roll it, it will encourage you to do music & light up. Red, blue, orange and yellow colorful lights are shiny! It stimulates curiosity and encourages exercise capacity and hand development. Besides finger play of beads and roller balls on the side. (From Amazon.co.jp)