Those are Tucker's two new words: Mo (more) and MaeMae (Robb's mom).
He has fallen in love with potato chips, and they were the impetus to this language discovery. At our therapist's recommendation, we have been encouraging him to give any kind of vocalization when he wants more of something, but we were very excited when he would say, "Mmmm."
Along the same lines, when he wants me to open something for him, I encourage him to say "Oh," or even just form his lips into a circle. (We're all about small victories at our house.)
Well, he was beginning to confuse those two - he wasn't sure when to say "Mmmm" and when to say "Oh", so he started putting them together: Mo. It all worked out in the end!
And you can bet your sweet bippy that he gets nearly anything he asks for mo' of.
His other breakthrough: MaeMae. We spent the evening with Robb's family tonight, and Tucker ran right up to Robb's mom and said, "MaeMae!" As if he's been saying it for weeks. MaeMae was abundantly pleased, as you would imagine.
How 'bout that.