Fisher-Price 4-in-1 Sling n Seat Tub Four-stage bath center now features Sit-Me-Up Support to aid unsteady sitters in the tub. From newborn to infant to toddler this tub adapts to Mom s and baby s changing needs at every stage! Stage 1 soft mesh sling gently cradles newborns in just the right amount of water giving little ones a sense of security. As the baby grows the tub grows too! Just remove the newborn sling and add the Stage 2 baby stopper insert. It puts infants at a gentle recline on a soft-foam surface preventing slipping and sliding and making bath time less stressful. When the baby is ready to sit up and play the baby stopper insert converts to a unique Stage 3 Sit-Me-Up Support that helps unsteady sitters to sit comfortably and allows parents full access for washing. And when the baby grows to Stage 4 Toddler the Sit-Me-Up Support easily removes to reveal a roomy tub that s just the right size.