Sarcasm

June: Noo! Nooo! Noooo! Noooooooo! [in response to our denying her a second beignet when she had merely licked the powdered sugar off the first one]
Me: Well, this is fun.
Louise: You're being sarcastic! [gleefully]

Ah, yes, the concept of sarcasm. A difficult one to teach but profoundly valuable once mastered. You're on your way, my dear, on your way.