Giant Polydron XL set 1 Take giant Polydron to the next level with the XL giant Polydron. The pieces are large enough that children can create buildings they can stand in and crawl though. This starter set is ideal for smaller groups of children looking to build a smaller tower with squares and triangles. 12 piece set containing: 4 Squares with 16 holes, 4 Squares with 4 Holes and 4 Triangles and a guide.
