The Quercetti Skyrail 'Ottovolante' marble run is a comprehensive set, consisting of 230 pieces. A roller coaster with a maximum length of 12 meters. This carefully designed marble run also features a manually operated lift. This allows you to send marbles that have been rolled out directly back up, only to roll them back down again. Children will playfully make interesting observations, experiments, and discoveries in the world of physics (speed, gravity, friction). All this makes it a marble run of exceptional and unique educational value, guaranteeing hours of fun. Includes marbles and an instruction booklet. Suitable for children ages 7 and up.