Click, connect, create. Build a house, magic ball, or towers. It's that easy, with the Magformer's 43 piece magnetic building set. This STEM toy comes with 20 squares, 17 triangles, 5 isosceles triangles, and 1 pentagon, in rainbow colors for this creative building and fun. With their intelligent magnetic design system using rare Earth magnets, Magformers fosters brain development in children while they play. This set is compatible with other Magformers and can only be found at Costco.