This excellent package contains enough POLYDRON to furnish a class of children. It comes with an excellent set of teacher's notes that will help the children to explore the world of basic geometry and shape and space. A thoroughly useful educational tool that will make a potentially complex subject simple and easy to understand and bring fun to interaction into the class environment. Geometric Construction System, designed to promote creative and educational development. The brightly coloured pieces made from tough ABS plastic simply snap together allowing them to hinge through 260 Degrees, and are highly flexible. POLYDRON is a favourite with teachers of the National Curriculum because of its wide range of applications.