My Munch is in such a language phase right now. He makes elaborate babble sentences with the most inquisitive look on his face as he looks straight at you. He's quite clearly explaining himself. He's saying many new words this week, including: Daddy (without the middle Ds, but definitely with two syllables), bubbles, bottle. He loves his B words.
Yesterday, I had to change his pants, and we were just rolling around on my bed playing and I said, "Okay, let me put on your shorts" just as a matter of course, as I usually do. He sat up and said, "No." Clear as a bell. I said, "You don't want me to put on your shorts?" He said, "No." Then I laughed so raucously that he tumbled all over me, giggling.
Probably not good that I taught him the word No delights me. But while he's been shaking his head No for a while now, this was the first verbal, purposeful No I've gotten. And I'm sure it won't be the last.
And, as time goes on, I'm sure it won't create quite as much delight in me!