Learning Resources Tactile Numbers & Operations. Learning Resources Tactile Numbers & Operations Class Set. Children trace the plastic tactile number shape with their finger by starting at the dot and following the arrows. If little hands go the wrong way the rough texture provides sensory input for self checking. Sturdy plastic is designed to withstand messy play. Includes 37 numbers and mathematical operations. Numbers and operations measure 10cm x 7cm. Suitable for ages 4+