"Ma-Ma" or simply "Moo"

During lunch today my little one turned to me and said "Ma-Ma". I was stunned. After hearing him learn the words: car, bark, Jack (really), Da, and of course his first word, Emma. He finally was saying "Ma-Ma".  I am so writing today down in his baby book.

Later as we were watching Curious George and getting ready for nap time, a cow came on the screen. "Mooo" says my little one. What?? Today he learned both "Ma-Ma" and "Mooo". They sound suspiciously similar when he is talking.

I have yet to hear "Ma-Ma" again but all day long if you ask, "what does a cow say?" you will hear: "Moooo".