The BPA FREE Fun Rattle™ by Nûby™ is another innovation in the learning and teething process, combining exercises for young hands, gums and teeth. It also provides sight and sound stimulation for your baby. This colorful rattle/teether has multiple teething surfaces as well as various colors, shapes and texture that aid in your baby's awareness of his or her physical world. One side of the rattle/teether is constructed of firm, smooth material that allows active gum exercise prior to the emergence of teeth. For newly emerged teeth, the soft textured side promotes development of strong, healthy teeth and stimulates both teeth and gums.