This Graco Swing transforms to a Bouncy Seat. The swing needs 3 D batteries for numerous swing speeds, music and nature noises. One D battery makes the Bouncy Seat vibrate. Swing for child 5-25 pounds, Bouncy Seat 5-18 pounds. This is a "should have" item for soothing your baby and offering you a break, even, possibly, putting your baby to sleep. The swing has a number of positions and folds for easy storage and transport.