Henry learned how to roll from his back to his tummy today and he's been doing it a bunch. A few times today he went from back to tummy to back again. He often seems to get stuck on his tummy and then get upset even though he's been able to roll from tummy to back for a month now.
And he was also working on his sitting skills today. He is getting better and better at it, still can't qutie do it on his own.
And he is learning to do more and more in general and becoming more and more alert and aware. It means he can have a lot of fun playing even by himself.