The Fisher-Price? Deluxe Infant-to-Toddler Rocker is a super-convenient, convertible infant seat that grows with your baby from newborn to toddler. It starts as an infant rocker or stationary seat with calming vibrations and two bat-at toys overhead. Then, as your baby grows, you can easily remove the toy bar and convert the seat to a toddler chair (up to 40 lbs). With an adjustable, three-position reclining seatback, machine-washable seat pad, and lightweight frame that easily folds for storage and travel, this convertible baby seat is the perfect spot for your favorite little person to sit, relax, and play! Where development comes into play? Sensory: From the engaging toys hanging overhead to the calming vibrations in the bright seat below, this rocker can stimulate or soothe baby's senses. Gross Motor: As tiny ones reach and bat-at the overhead toys, they're strengthening those all-important gross motor skills. Security & Happiness: A comfy seat and calming vibrations help soothe babies. Use the product from birth until child weighs 40 lb (18 kg).