Motherhood is not good for my self-esteem

Aviana: You know why I'm just sitting here not doing anything?
Me: Why?
Aviana: I'm practicing to be a mama.

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Aviana: Mama, what's plump?
Me: It means just a little fat.
Aviana: Oh, like you?
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Aviana and Brielle were arguing whether or not balloons were made of paper or plastic. Usually, I just let them work it out, but Miss A was not being kind to her sister. I entered in the fray by contending they were made of neither.

Aviana was not about to concede her position, but finally after much patient (on my part) back and forth, she gave up, saying, "Fine. You can't teach a Sneetch."

What? Am I a Sneetch in this little scenario?

Bless her little innocent heart; she means well. It just doesn't come out that way sometimes.