I've always wanted to teach baby sign language to my children. I have known people who did it, and it was really cool to see pre-verbal children being able to communicate with their parents. It seemed like something that would eliminate a lot of frustration.
So I bought a book about signing with babies and started looking for opportunities to sign to Carter. The signs I've been most consistent about using are "milk" (for nursing), "more" (for when we switch sides), and "finished" (for when we're done nursing). I've also been signing for "ceiling fan", "kitty" (he's recently started noticing the cats), "change" (diaper), and "I love you".
I always sign "milk" right before nursing, saying, "Do you want milk?" and then sign and say "milk" a few times once he starts nursing. Last night he almost seemed to be signing it back to me, though it might have just been a coincidence.
But this morning, progress! He was sitting in my lap playing and started to get a little fussy. It had been a few hours since he'd last nursed, so I signed and said "milk?" He gave me a huge smile and buried his face in my chest! I got the boppy and settled him on it and signed "milk" again, and he grinned and turned his head toward my boob. So I think he's starting to understand something, even if it's the verbal cue more than the sign. I've heard that they don't really start signing until 8 months or so, but the earlier you start, the better. :-)