Giant Polydron Construction Set - 150 piecesUnlock big learning through big building with the Giant Polydron Construction Set 150 Pieces! This tactile, oversized construction set is designed for young learners to explore the fascinating world of early STEM through hands on creativity and imaginative construction. Whether creating larger than life 3D structures or investigating simple shapes and textures, Giant Polydron makes early mathematical and engineering concepts accessible and fun.