Part One
Me: Sophie, you CANNOT dance with your baked beans.

Part Two
Me: Martin, you have to stay still.  You cannot go to sleep if you are wiggling.  You have to let your body rest.  No moving.
Martin: What about sleep walking?
Me: Hey, good question.  Why don't you try it tonight?  Now go to sleep.

Part Three
Sophie: Mommy, I a police officer.  You have to go to jail.
Me: Okay, where is jail?
Sophie: In the laundry room.
Me: Well, that seems fitting.