These cards will help children to learn about the difference between natural and man-made materials. The cards include such materials as wool, cotton, wood, flax, leather, stone, sand, gold, steel, plastic, rubber, glass, fabric, viscose, paper, polythene. There is a version of cards with color borders and without them. The material has a control of error. The material consists of:- 2 label cards (natural and man-made materials) - 2 description cards - 16 labels with names of materials - 16 pict