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 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 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 baby grows to Stage 4 Toddler, the Sit-Me-Up Support easily removes to reveal a roomy tub that's just the right size.