This accessory box contains 12 classic magnetic Magformers hexagons which contain free-spinning neodymium magnets safely sealed in every edge. The pack is the perfect stocking filler or birthday present for any child who has an existing Magformers collection - as you simply can never have enough hexagons. The pieces are compatible with every Magformers set in existence. Other 12-piece box sets include squares, triangles, trapezoids, pentagons, rectangles, super triangles, isosceles triangles, etc. - all the main Magformers building shapes.