This material is 3 separate wooden boxes, each containing 6 identical boards. The purpose of the activities is to determine the different weight of the plates and sort them according to this criterion. The lightest tiles are the lightest color and the darkest ones. We recommend that the child work with closed eyes to cause the senses of his hands to determine the difference.
Size of the boxes: 10 x 8 x 5 cm.
Size of the tiles: 8 x 4.7 cm.
Weight: 0.620 kg.
Suitable for children over 4 years of age. 
