Magformers Magnets in Motion Accessory (20-pieces) Set Magnetic    Building      Blocks, Educational  Magnetic    Tiles Kit , Magnetic    Construction  STEM gear Toy Set Add Movement to any Set! Compatible with all MAGFORMERS shapes and accessories. Gears and Gadgets for dozens of crazy contraptions! BPA Free HQABS Plastic. ABS plastic magnets conform to CE, ASTM and EN71 Add Movement to any Magformers Set! Gears and Gadgets for dozens of crazy contraptions! Engage Mathematical and Scientific Thinking, Deductive Reasoning and Spatial Awareness