Watch them delve right into the intricacies of the Solar System in the LEGO Technic: Planet Earth & Moon in Orbit Space toy set. The 526-piece set has a crankshaft that allows kids to create rotations. Printed months and moon phases represent the celestial progress throughout the year. Your kids can even use this toy set as a space room décor. | LEGO Technic: Planet Earth & Moon in Orbit Space Toy Set - 526 Pieces (42179)