Second Son can roll from his back to his stomach! I know this because multiple times during the night he woke me, upset to find himself on his stomach and unable to "right" himself in his semi-awakened state.
Then he would want to nurse.
I did not get much sleep last night.
He also started signing "all done." I thought I had seen it once or twice, but today it was unmistakable. This is one of the most helpful signs as, in theory, it helps avoid the potential for vast amounts of food cascading to the floor. Second Son has most often made this sign while incredibly upset. Hopefully he learns to sign when he's ready to wrap up a meal before he gets so angry.