Arthur is playing favorites. Although he will answer questions like, "What does a cat say?" with "'ow'', when I ask them (and "aw aw" for crows and "wack wack" for ducks), he will not say (and sign) when he's "All Done" with a meal. Which he will for Mark. He also seems to be eating more for Mark in the evenings.
Arthur does like to wrestle with me, and continues to ask me to catch him as he falls backwards.
He's also expressing so much interest in the Macintosh that today we checked out the book, "Arthur's Computer Disaster" from the library. For a library encore, Arthur climbed three flights of stairs.
In the physical development department, we've started measuring him and he's grown about a half inch in the last week. I'll have official numbers for his height and weight after the next wellness doctor visit, which isn't for a month or so.