With the two knobs the steel ball is steered through the labyrinth. The more the ball rolls, the higher the score. A versatile, fascinating game that promotes concentration, coordination, perception and fine motor skills - and last but not least the ability to occupy oneself. A classic for players of all ages. Since 1946 more than 3 million copies have been sold. Promotes the ability to concentrate, coordination, perception and fine motor skills - and last but not least the ability to occupy oneself.