Designed for whole class use, this 72-piece set contains 36 triangles and 36 squares. Groups of children will love to build 2D and 3D shapes at the same time. It includes 5 appealing translucent colours and the colour coding teaches polarity as the children build their shapes. The pieces are compatible with all existing Magnetic Polydron sets and are made from super tough, engineering grade, MBS. Building guide included.