From the seller

Babies love to reach for, grasp, and hold objects within their field of vision. While their little eyes are still developing, they are best able to see patterns with strong contrasts. This teething rattle features black, white, and bright colors to help baby develop vision and focus. The handle is easy to grasp, making it comfortable for baby to hold while exploring all the features the toy has to offer. The ball, with clear and black stripes, rattles when shaken or moved, teaching baby the concept of cause and effect while developing their sense of hearing. The movable and spinnable beads provide tactile stimulation to spark baby's curiosity and interest.