See the solar system in motion! Build a mechanical model of the solar system, consisting of the sun and 8 planets. Then wave your hand and watch the planets revolve around the sun. As you build, you will learn how the gears and screw mechanism work. Name and describe each planet - what color it is, what size, how far it is from the sun, and learn other interesting facts about the solar system. The model works mechanically, so it does not require any elements. This set is perfect for little planetologists and will be useful for educational institutions that want to visually convey learning material about the planets. By the way, if a mysterious ninth planet were discovered, an additional hole was left in the model for it.