The fisher-price infant-to-toddler rocker starts out as a soothing infant rocker or stationary seat with two bat-at animal friends overhead.Where development comes into play gross motor: the fun animal friends encourage your baby to reach and bat, strengthening those little muscles! Sensory: soft fabrics, bright colors, and fun clacking sounds engage your baby's tactile, visual, and auditory senses. Security & happiness: the deep seat, cozy fabrics, and calming vibrations help your baby feel secure and happy.