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 seatback, calming vibrations, and a colorful (and machine-washable) seat pad, this rocker are the best (baby) seat in the house! 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 babys tactile, visual, and auditory senses. Security & Happiness: The deep seat, cozy fabrics, and calming vibrations help your baby feel secure and happy. Use from birth until a child weighs 40 lb (18 kg). Age: 3 Months+!