What was your baby's first sign?

Woops, seems I’ve been in this thread before. Only noticed page 2 until after I posted. Now I have 3 signing time dvds and we’ve watched them a few times, she has signed dog, cat, milk (finally!! At 17 months) points to herself and says “ME” and today when she noticed her rubber ducky in the lounge room, after a few baths asking for it and me clueless as to its whereabouts, she rubbed her chest and kept saying “BAAAA BAAA” so I’m assuming that’s “bath” and the sign for bath. (I dont know, just a hunch based on my powers of deduction. I find it difficult to remember all the signs).