You Know What Else Children Don't Know?

This story started with the writing prompt:

"You know what else children don't know?"

which seemed a likely candidate to be its title. So it is. Not sure where the prompt originated, but consider this my "Thank you, you twisted writer's prompt person, you" to the twisted writer's prompt person who thought that up.

You can click on the image to see the whole thing full screen biggie-sized.