Last Monday Andrew rolled from his tummy to his back for the first time! I was so excited! I have been waiting and waiting for him to do it. He has been close for awhile, but would only be able to go on his side. And now that he has mastered this skill he keeps doing it. Every time I put him on his tummy he rolls over, sometimes it takes him a little longer, but he loves being able to control his movement.
He is also close to rolling the other way--from his back to his tummy. But I'm not anxious for him to master that one. I think it might make diaper changes more challenging.