Fix them to a fence, wall or use them on the ground, encourage big movements as children trace their finger with chalk or wipe away with a damp cloth. The blank chalkboard is great for copying the digit freehand, or drawing the number of objects, or asking whats the missing number? Made from a hard-wearing, weather resistant material, these lightweight chalkboards are perfect for indoors and out. Set of 5, each measuring 38x38cm.