Made with recycled plastic, Geomag Mechanics Motion Gears Recycled 160 pieces combine the force of magnetism with mechanical construction. Geomag Mechanics Motion Compass 160 pieces stimulate children's creativity, inventiveness and a hands-on approach to problem-solving. In addition to magnetic rods and steel spheres, Geomag Mechanics adds mechanical elements within the construction platform that allows for expanded play possibilities. Structures rotate by triggering chain reactions using magnetic attraction and repulsion. STEM.org authenticated toy that helps in the development of creativity, fine motor skills in addition to stimulating imaginative play and curiosity through the science of magnetic construction. Recommended age 7+ years