Made with 100% recycled plastic, Geomag Green Line Panels 388 pcs, our largest cold color sets, uses powerful magnetic rods, steel spheres and tiles, allowing children to create unlimited structures. The tiles 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 and promotes hands-on learning by offering a creative approach to problem-solving. Helps in the development of fine motor skills with endless construction possibilities. • 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 • Helps in the development of fine motor skills • Endless construction possibilities • STEM.org authenticated • Includes a portable storage box and and instruction booklet • Made with 100% recycled plastic