This set of two University of Arizona rattles is designed to make it easy for small baby hands to play with. Baby-friendly products help your little fan grow healthy and happy. Growth & Development toys offer Co-Play Fun, Tactile Play, and Sensorimotor Skills. Show baby how to shake the rattles to make noise. Your smile encourages baby to keep playing as you teach them new skills. Help baby develop grasping and fine motor skills. Knobs, handles, and rings offer various shapes for baby to explore. Baby discovers cause-and-effect of movement making sound. Rings shake against each other to create rattle sounds. Real wood rattles are 100% Baby Safe made with real wood, non-toxic colors & finishes, and free of BPA, phthalates, & formaldehyde.