Made with 100% recycled plastic, Geomag SUPERCOLOR Panels 52 pcs uses powerful magnetic rods, steel spheres and panels, allowing children to create unlimited structures. Panels provide a way to create rigidity in every structure thus allowing taller and larger structure to be built. Great introduction to STEM activities. • Designed to help stimulate children's creativity by allowing for expanded play possibilities • Promotes hands-on learning and offers a creative approach to problem-solving • Includes two storage cases made out of 100% recycled plastic • Includes instruction manual in every box • STEM.org authenticated