The Space Magnetic Mission Set XL300E is a marble run for children, boys, and girls aged 4 and up. This construction set includes 120 pieces and 10 MarbleBalls, including 5 MagiTech Metal MarbleBalls, to build a sensational space-themed marble run. With the MagiTech Metal MarbleBalls, new play areas can be created to explore gravity and promote the learning of STEM concepts. By placing the MarbleBalls in the rocket, they are recognized and the metal balls are sent to the UFO elevator, which uses magnetism to bring them to the top of the track. Two magnetic arms can also be moved from one track to another as if by magic. The many secret passages, switches, and interaction zones allow for the classic MarbleBalls to roll through the track and make them even cooler. Thanks to this marble run, children develop their motor skills, creativity, logic, and imagination by creating endless combinations. There are 3 building levels: beginner, advanced, and expert. Suitable for ages 4 and up. Batteries (2xLR6-AA) required.