I love kids!
When I taught 2nd grade, after repeated questioning about my age, I finally broke down and told them I was 642. One girl obviously believed this was not the truth: "Un-uh!" she said. "If you was 642, you'd be dead."
Well, then I had to explain, "Oh, you were thinking years. No, no. I'm 642 yappas." For some reason that was a much more acceptable answer to them.