So a few weeks ago AC said Mama for like a day and then stopped. Well yesterday, we were out to dinner and some older ladies were waving at her and saying "hi" so she waved back at them and said HI!!! We looked at her and thought no way. So we kept saying "hi" to her and she kept saying it back, and has still been saying it today. Not really what I expected her first word to be, but exciting nonetheless, especially since she is so much less vocal than DS.