GoGoChews Chewable Pencil Toppers, Oral Therapy Chew, Special Needs Sensory Motor Aid, Chewing Aid, 5 Pack With Exclusive Colors SAFETY: Made of 100 % FDA-approved, BPA & Phthalate-free, food-grade silicone; durable yet soft and gentle on teeth. DURABILITY: Can withstand REPETATIVE use. Tough enough for adults who are seeking sensory input as well as children. HELP YOUR CHILD FOCUS: Perfect size for your child to take to school. Use during class to increase attention & focus. SIZE: Nicely sized at 2.63" tall, our chews fit perfectly on pencils, pens, crayons, & most writing devices. EASY TO KEEP CLEAN: NO ODORS or TASTE. They are 100 % dishwasher safe and resistant to mold and bacteria.