Stuck

Graham has become very interested in trying to roll over from his back to his tummy. He accomplished rolling over from his tummy to his back when he was just five weeks old, however he has yet to go the other direction. It seems like every time I put him on his back he instantly rolls over to his side and can get his legs flipped over but not his upper body. He then gets stuck in this position! He'll lay there contently for a couple of minutes before he gets frustrated and turns to crying because he can't move in either direction! Soon enough he'll have this figured out and then our little guy will be rolling all over the place!