Babies love to bounce and sway, and that"s what the mamaRoo does. It still moves like you do. The mamaRoo is meant for babies from birth to 25 lbs (usually about 6 months), or until they start to sit up unassisted. The mamaRoo is truly remarkable. From planning to production, it was shaped by the expertise of designers, doctors, nurses, and most importantly, hundreds of parents. Our team used motion sensors to measure movements of real moms and dads as they soothed their babies, and guess what was found? Parents don"t vibrate like bouncy seats or swing like swings. They bounce and sway. When w4moms set out to create the mamaRoo, they put motion sensors on moms and dads and measured the ways they moved to comfort their babies. While there"s no one universal movement that everybody makes (that would have been too easy), there are certain types of calming motions every parent uses. That"s why the mamaRoo has five different motion settings. Each one is a variation on the up-and-down and side-to-side movements research found parents making over and over again to soothe their infants. It"s not just a tagline: the mamaRoo really does move like you do." The next study involved the speed of these movements. There"s a very real difference between how a motion looks and how it feels. Think about the swinging pirate ship rides at amusement parks: they look like they"re moving slowly, but step on and you"ll find that"s not the case. The mamaRoo"s motions were chosen for how they feel, and most importantly, for how they feel to an infant. What seems slow to an adult may be just right for a baby, and that"s what we"ve seen time and time again with the mamaRoo. Using extensive field research, babies consistently love the mamaRoo and find it very soothing. As such, speeds are widely adjustable to control movements. The mamaRoo"s seat reclines to any position along its axis. The machine washable f