The Rough and Smooth Boards with Box are a classic Sensorial material for the Primary environment in which children refine their tactile sense by running fingertips across alternating strips of sandpaper and smooth wood mounted on wooden boards. This material builds the foundation for stereognostic refinement and directly prepares children for later work with sandpaper letters and numbers through the internalization of a controlled, deliberate touch. The accompanying storage box keeps the boards protected and organized on the shelf, which matters in a high-traffic classroom.