Magnestix Intellectual Magnetic Building Assembly Toy 420 Multi Colored Pieces (Ten Sets of 42 Pieces Each) A collection of magnetic sticks and metallic spheres Can be used to build structures like bridges, towers, houses, geometrical models, architectural models, chemistry models, etc. It is a fantastic toy to promote children's creativity. 6 multi-color sets and 4 all metal sets 420 pieces (10 sets of 42 pieces each )