Specifications: Color Perception & Audiovisual Development12 kinds of brightly colored balls, multi-sensory grip rattle and teether encourage grasping and reaching, with a rattle ring that slides back and forth to produce a soft rattling sound, which is important for color perception audiovisual development Meet the Needs of the Oral Phase & Relieve Gum Pain12 gnawing points and 2 different textured surfaces to massage the gums to more effectively relieve teething pain and meet the needs of the baby's oral phase, leading to the development of other bad habits Rattle & Ball DesignTeething toys are designed in a ball shape with 12 nibbling points to massage the teething bed to promote baby's sensory development and massage the gums to relieve teething pain Boiling Water Sterilization & Easy to CleanThoroughly sterilized before use. Baby teether is made of heat-resistant material and can be sterilized by UV light and boiling water (Note: only one minute when sterilized, please do not touch the bottom of the pot. Do not use the microwave oven to sterilize this product.) Safe & Worry-Free After-Sales Service Baby teether is durable, made of food-grade ABS material, BPA-free and non-toxic, if you have any problems after use, please let us know and we will provide you with a satisfactory solution!