How Old Do You Think I Am?

:Last week @ the preschool:

Note: I don't have this word for word

[Kids say something about kindergarten]
Me: "You guys are going to have SO much fun in kindergarten."
A: "How do you know about kindergarten?"
Me: "I was in kindergarten a loong time ago."
A: "Aren't you in our class?"
Me: "No. I am in your class, but I'm not a preschooler. I'm older than you."
A turns to L and says, "I think she's in fifth grade."