Place the 16 parts in the frame and then let the supplied balls roll in the right direction and at the right speed in the right direction. This Quercetti balance ball Laby game is fun and educational because children use their fingers to tilt the track and react to the balls that move. This stimulates motor skills and the development of hand-eye coordination. With this balance track, 1000 different combinations are possible. Including 2 balls. Suitable for children from 18 months.