This 80 piece set contains an equal number of squares and triangles which will occupy a classroom or large group of children at the same time. They can learn to construct objects such as a tower or a castle. The pieces are large and chunky so they are ideal for little hands to manipulate. This 80 piece set contains 40 Squares, 40 Equilateral Triangles and a guide. Sides of square measure 21cm (8-1/4”). Made from 100% recycled materials.