Rowan celebrated the 5 month marker by rolling from back to front. For the last 1.5 weeks he has been rolling on his side and really arching his back, but he just couldn't get over the hump of that left shoulder to get onto his tummy. On Saturday morning I looked at the monitor and there he was sleeping on his belly. Again Sunday he woke up on his belly, despite starting on his back. Then Sunday morning on an open floor he worked and worked and finally we watched him roll. Such a big boy!!