Babies grow quickly—in both size and developmental skills. With four distinct stages, now including a unique Stage 3 Sit-Me-Up Support, Fisher-Price 4-in-1 Sling ‘n Seat Tub is the only bath tub you’ll need from newborn…all the way to toddler! It ‘grows’ as baby grows, helping baby feel comfortable and secure in the tub 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 & 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.