Junior Polydron fits together easily and stays together. It is made from super durable polypropylene and designed to allow the easy construction of thousands of exciting models such as cars, planes and other fun models. Contents: 45 triangles, 45 triangles with hole, 60 squares, 60 squares with hole, 36 spacers, 12 wheels, 18 axles, 36 heads and a leaflet.