Baby can place balls in the dino to see them pop up or roll down and away, as happy music and sounds play along. It's fun to watch the balls pop up while at the same time holding and placing the balls into the dino improve hand-eye coordination for the child. Additionally, the young person is given a great physical workout as they keep up with the action. The way the spinning roller works is that it starts music and the balls popping. The balls are in six different colors. Babies still crawling are encouraged to track down the balls as they roll across the floor. Everything about this toy promotes playful, energetic activity.