The set includes 20 equilateral triangles, 12 right angle triangles, 12 isosceles triangles, 20 squares, 10 rectangles, 12 pentagons, 4 hexagons, 8 sphere pieces, 12 quadrant pieces, 4 cone pieces, 4 cylinder pieces and a guide. You can make shapes such as a tetrahedron, cube, octahedron, icosahedron and dodecahedron to help learn platonic solids, plus a wide variety of different prisms, anti-prisms and pyramids. Once the basic shapes have been mastered, children can make spheres, cylinders and cones as well as cross sections of them. Open frame pieces allow you to see inside. All pieces are magnetic. Square measures 6 x 6cm (2.4 x 2.4 inches). BPA free. To clean, sterilize with alcohol-based sanitiser. Supplied in a sturdy, reusable and recyclable carton.