Fearing I was going to need to make a call home to a parent, I asked her what it was.
"I'm going to save the world, you know."
I said, "Oh, really? That's awesome. How are you going to do that?"
She looks both ways in the hall to make sure no one's coming, and then she leans close and tells me, "...I have superpowers. But you can't tell anyone because you'll give away my secret identity. Shhhh."
And then she scampered off to class.
Context's secret identity works in a preschool.