Mechanics Gravity Loops & Turns 130 pcs is made of recycled plastic and harnesses the invisible forces of magnetism and gravity in an original and surprising way. The balls inside the circle are set in motion by an innovative magnetic gun that uses the force of attraction of the accelerating magnet. This set includes magnetic rods, balls and plastic elements - everything you need to build freely and create chain reactions. Mechanics Gravity is made of recycled plastic and is the innovative evolution of the Geomag Mechanics line. Movement is created by the invisible forces of gravity and magnetism, without the need for electricity or batteries. The play experience is based on these fundamental principles of physics. Mechanics Gravity is a STEM product that awakens curiosity and encourages learning more about science.