Elizabeth is constantly screaming Mama! Her first word! OK, ok, so maybe she doesn't just say Mama and says "Mamamamamamamama," and only when she's unhappy and doesn't even realize what she's doing. But STILL...she is pronouncing the syllable mama! She slips in alot of boos, bas, oohs, and ahs too, usually when she's upset. Now, whenever she cries Dave says, "Oh, she's saying mamamama so she must want you to go get her." Nice try Dave. 
