There is a hole in the ball with a smaller ball inside, so you can move the smaller ball into the empty hole and further jiggle the balls. Then you need to find out how to return the coloured ball to the appropriate colour holes.1 rainbow ball with 12 round different coloured holes, now there are 11 extra small balls in the rainbow ball. Exercises your memory and hands on skills; a perfect educational toy that keeps everyone busy for long periods. Small treasures football shaped rainbow ball is a ball puzzle for on the go, ideal for travel for children. Children can also develop their brain and logical thinking. Pls call us for more info!