The Geomag Mechanics Gravity Motor System combines magnetism with the forces of gravity. This 169-piece construction set allows you to build fascinating mechanical models and explore the basics of physics in a playful way. Using the gravity motor and magnetic transmission, the structures are set in motion completely without batteries. The set includes 11 magnetic rods and 32 metal spheres, which serve as central elements for the marble runs and gear mechanisms. This STEM toy, manufactured in Switzerland, promotes technical understanding.