Ideal for classrooms of children to build towers, houses, and tunnels: · Teaches shape and space through play · This 36 piece set contains 24 squares (in 2 designs) and 12 equilateral triangles in 4 natural colors · Children will be able to build large constructions, whilst all the time learning about shape, 2 and 3 dimensional objects, texture, team-work, and role play. They will work together to put their ideas into reality. · The pieces easily slot together to create sturdy structures · Lightweight and safe to use · 4 times the size of Giant Polydron and also compatible with Giant Polydron · Use indoors or outdoors. Easy to pack away. · Squares measure 15.94" x 15.94"