Grimm's Large OctagonGrimms Large Octagon is an expansive geometric building puzzle designed to unlock the full creative potential of the triangle. With 72 wooden pieces in 9 vibrant colours eight triangles per colour forming nine individual octagons this set offers even greater scope for exploration, symmetry, and design. From small triangles to large octagons, children can discover how one simple shape becomes the foundation for stars, hexagons, complex mosaics, and