Develop ideas with shape and space with this pack of 60 Relational Attribute Blocks. Children will learn key concepts like large/small thick/thin colour, shape with these solid plastic pieces. Within the pack there is an assortment of 5 shapes, 3 colours, 2 sizes & 2 thicknesses. Including a sorting & storage tray.Large square measures 7.5cm sides, all small shapes are 1/4 of relative large shapes.