The tractor is a useful aid for teething babies. Chewing on its different surfaces provides plenty of variety and induces relaxation. Babies can also grasp the toy well with their hands. Material: silicone.Dimensions: approx. 3.1 x 3“. The different textures of this adorable tractor teether provide necessary oral stimulation and help relax the jaw muscles. Babies can also grasp the toy well with their hands as they develop fine motor skills and reflexive clutching. HABA's silicone teethers are dishwasher safe and easy to clean. Perfect for multi-child situations. This tiny clutching toy measures just 3.1" x 3" and is designed for little hands ages 6 months + At HABA, children's safety is our #1 priority. All HABA toys are rigorously tested according to European and American safety testing standards for toys. Cleaning Instructions: HABA recommends boiling as the most natural way to clean and sanitize. They can also be washed by hand with soap and water (rinsing thoroughly) or placed safely in the dishwasher. Please do not use a home sterilizer.