This material is a First Fabric Box. The child pairs the fabrics according to the varying textures by feeling with the fingers.
A wooden box contains 24 matching swatches (12 pairs) of a selection of different fabrics - cotton, satin, silk, velvet, and etc.
Each measures 5.5 x 5.5 inches.
Different fabric materials are used that the child must feel and match. A blindfold is usually used so the child cannot see the materials.