LEGO® Technic™ Planet Earth and Moon in Orbit (42179) space toy set for kids. The interactive set makes it easy to understand different concepts like the orbit of the Earth and the Moon, the Earth’ ... s gravitational pull and how the rotations affect the seasons. Cool features include a crankshaft that boys and girls can turn to create the rotations. There are also printed months and moon phases to show the progress of the Earth, Sun and Moon throughout the year. This set makes a great gift for kids who love planet toys. Check out more space gifts (sold separately) in the LEGO Technic range. Includes 526-piece set with a model measuring over 24 cm high, 33 cm long and 18 cm wide.