I think that might be the first observational full sentence I have ever heard him make. He'll ask for things, answer questions -- operational stuff. But this was just a shared observation. It was cool. I offered that A. is crawling, and he repeated that back. We passed the three ideas around a few times (that's A., A. is playing on the grass, A. is crawling) before he went back to what he was doing.
I got the Space Mountain picture off the wall to talk to him about it, but he mostly just asked me to put it back.
A. has been very interested in the Chef Mickey and Buzz Lightyear pictures of, respectively, the family including grandma and grandma, A., and me. She points at people and I say their names. Also, she tries to feed Chef Mickey in the picture. They are hung low enough for her to reach if she stands on my chair and she will try to remove them from the wall if I don't get to them first.
I had a whole stack of frames out on the dining table (in the living room, since the dining room isn't a dining room any more), trying to get pictures up on the wall. I've been mostly successful, and very pleased both because we have more pictures up on the wall, instead of sitting in envelopes waiting to find a home, and because they are there for the kids to notice and comment on and think about.