Giant Polydron House Builder contains enough pieces to build a house, a skyscraper, a church or any design from within a child’s imagination. Children will not just love building their house but will also have fun looking through the windows at each other and they will learn about shape and space whilst they play. This 72 piece set contains 16 Squares, 8 Equilateral Triangles, 30 Gear Squares, 16 Windows, 2 doors and a Poster. Sides of square measure 210mm.