This bumper 184 piece set contains 20 hexagons, 40 squares, 100 equilateral triangles and 24 pentagons in red, yellow, blue, green and clear, allowing you to make all types of 2D and 3D shapes such as cubes, tetrahedrons and dodecahedrons. It also includes an exploring booklet. Children will see inside solid structures and begin to understand the shape and space within. The clear pieces are ideal for colour construct within models. Sides of squares measure 7.5cm (2.95 inches). Recyclable. BPA free. Dishwasher safe at 70 degrees Celsius (158 degrees Fahrenheit). Supplied in a sturdy, reusable and recyclable carton.