Fisher-Price Infant-to-Toddler Rocker (Birth – 12 Months – White). The Fisher-Price Infant-to-Toddler Rocker starts out as a soothing infant rocker or stationary seat with two bat-at animal friends overhead. Then, as your baby grows, you can remove the toy bar and convert the seat to a toddler rocker (up to 40 lb/18 kg)! With a deep, cozy seat, reclining seat back, calming vibrations, and a colorful (and machine-washable) seat pad, you and your baby will love this convenient chair. 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. Max. weight: 40 lb. Use from birth until child weighs 40 lb (18 kg).