Waldorf Education 3D Shape Sorter is an educational aid for children to learn the concepts of geometrical 3 dimensional solids shapes and sizes. It is a perfect toy to play and learn about the visual change in volume of a shape by changing only one dimension. The pieces can be stacked and balanced in numerous arrangements with imagination being the only limitation. The pieces have to be matched in their respective slots. Handmade with love by Numobel in INDIA