Made with 100% recycled plastic, Geomag SUPERCOLOR Panels 35 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 one storage case made out of 100% recycled plastic• Includes instruction manual in every box• STEM.org authenticated