Infant To Toddler 2 in 1 Bay Rocker in Pink Color Best for your child (0+ Months Ages). Details About Items; Use the infant rocker seat (recline) from birth until child is able to sit up unassisted, Use restraint system until child is able to climb in and out of product unassisted, Use upright position (toddler mode) only with a child who has enough upper body control to sit up unassisted.