K.L.
Never had a bed rail for either of my kids or any of the daycare kids who slept here. Never had a problem. Havent used one for my grand daughter in my bed for her naps or on the couch. She hasnt fallen off yet. Id say 3 is plenty old enough to go without and be able to just get back up and into bed if they do roll off. If they never have the railing, they learn to sense the edge of the bed sooner and dont fall. (o: