Recently 2 other mom had asked how I transitioned Jameson from his sleeper to his crib. I got recommended The Magic Sleepsuit which I purchased at amazon.com. It keeps them from turning and stops them from waking themselves up with their hands. But they get too big and start turning over but can’t quite turn back yet. So then my man actually did the research and found The Baby Boom Reste Safe Sleep Solution which we purchased at buybuybaby.com. It keeps the baby on his or her back until you feel they are strong enough to move from back to stomach and to back again. Hope this gave all you new mommas some direction.