Jack laughed for the first time yesterday! Jon tickled him and blew raspberries on his tummy - this elicited giggles almost every time. We got some on video (I'll have to figure out how to post that - or better yet, have Jon do it for me.) The giggles are continuing today. He's also starting to "talk" - or at least work on breathy vowel sounds. He really likes it if you "talk" back to him, saying the same sounds he is. =)
Then today, Jack rolled over for the first time! He definitely didn't intend to, and we don't think he realized that he did it. He was having tummy time and started spitting up through his nose. It freaked him out so much that he rolled right over to his back. Jon and I both got to see it, which was fun. (Well, except for the screaming and pain associated with the reflux in his nose.) We're thinking it will be a while before he does it again - since he seemed to just be trying to get away from the spitting up. But it was a big weekend for him! =)