Sensory University has created an all new pencil topper. If your child bites, chews, or grinds, give him or her something safe to chew on. The Chew Stixx Pencil Topper fits any standard number 2 pencil. The use of this product decreases exposure to dangerous chemicals, is safe for teeth, is socially acceptable, increases attention, lowers anxiety, and has been proven to increase concentration skills in children constantly seeking sensory input. Two pencil toppers are included in a pack. Not for use for children under the age of 4 due to a possible choking hazard.