Do you have students who just can't sit still at their desks, or who tell you that they can never concentrate on their homework? They need the Busy Fingers Tactile Ruler! Our unique ruler is perfect for use both in the classroom and at home. Both practical and socially acceptable in a school setting children will benefit from the sensory input the ruler provides. Manufactured from FDA-approved food-grade silicone. Measures 32cmL x 8cmW. Note: not intended as a measuring device.