The Sun Earth Moon model (42179) from the LEGO Technic series is a playset for children aged 10 and over. It consists of 526 parts and impressively illustrates the orbits of the Earth and the Moon . Your child can use a crank to rotate the celestial bodies. This gives a vivid representation of different phenomena such as gravitational pull . The movements of the Earth and the Moon in relation to the Sun over the course of a year are thus visible.