(1) We most likely have a thumb-sucker on our hands. We try to get him to take a paci - won't have anything to do with them. I try to pull the thumb out, but he just thinks it's a game and puts it right back in his mouth as fast as he can. I mean, the instant you lay him on the changing table, the thumb goes straight to the mouth! Not too happy about this, you can take away a pacifier, you can't (ethically) cut off a thumb.
(2) Brock is attempting to sit on his own, but he is a bit too squirmy, a bit lacking in abdominals and a bit lacking in coordination, but he's got plenty of time to figure that one out.
(3)He laughs, a lot, at everything. This was my one hope, I really wanted a giggly baby. (I may or may not spend my entire day coaxing the child to laugh though...)
(4) His habit of going at his fingers, or your fingers, or Stewie like a rabid dog has worsened.
(5) He is filling out - finally.
(6) He fights sleep, more often then not. He takes little cat-naps all day leaving me very unproductive, but sleeps 8+ hours 5-7 nights a week. So, I'll take it!
(7) The position he is happiest in; standing and facing outward - especially with dogs in view.
Finally, here are 2 videos: the first is "Father Son Balancing Act", the second is "Giggles at What?" (thanks for the toy, Maggie)