Attribute blocks are an ideal resource to reinforce sorting skills to students. Attribute blocks have four distinguishable attributes: size, thickness, colour and shape. From Venn-diagrams to Carroll diagrams and from tree diagrams, students will learn to sort and classify the blocks in many different ways. Don’t let your blocks sit unused on the shelf! Young children use this set to develop shape and colour recognition and older children to develop more advanced skills. Each set contains 5 shapes (circle, square, triangle, hexagon, rectangle), 3 colours, 2 sizes and 2 thicknesses. A total of 60 pieces per set. The largest square of the student set is 5 x 5cm.