Just a couple days after Baby A turned 6 months, she mastered sitting up. And she loves being able to sit up! At first, she would dive at toys that got too far away from her, or arch her back and fall over, but as the month went on she got better and better. I don't know why, but seeing her sit up makes her seem much more like a real person, and less like a baby.
Baby A is still in a combination of clothes... 6 month, 9 month and 6-12 month fit depending on the particular outfits. I have noticed that some of the pants are getting a bit short though, so I think she's getting even longer.
We've got quite the chatter on our hands. Any time we take Baby A to a store, she squeals like crazy! She's also big into blowing bubbles and fake coughing. We think her fake coughs are laughs (or at least that's what we tell ourselves).