Different sensory patterns on each square for different sensory feedback. If your child constantly fidgets in his or her desk, or at home while doing homework, the Desk Buddy Sensory Bar is for them. A team of occupational therapists, school teachers, and product engineers combined efforts to create this product for use both at home and in the classroom. For children who are constantly looking for different textures to touch or "fidget" with, the Desk Buddy is both practical and socially acceptable in a school setting. It is simply a ruler sitting on their desk. The desk buddy is constructed from an FDA approved material so it’s even safe to chew on if the need were to arise. Completely dishwasher safe, and naturally bacteria resistant.