The Ergobaby Evolve Bouncer is a true 3 in 1 bouncer. As a result, it grows with baby from newborn to infant to toddler. From day one, baby will experience comfort from head to hips thanks to the ergonomic newborn insert developed with guidance from a pediatric orthopedist. As baby grows, evolve the Bouncer by removing the insert and choosing from three heights tailored to every stage of development. Our middle position allows infants to rock themselves (relaxation for hours!), while the highest position is perfect for toddlers who want to see everything that’s going on around them. The Ergobaby Evolve Bouncer uses natural rocking technology. This means no plugs, batteries, or switches needed. Plus, that means it’s lightweight and easy to move from room to room.