Me: Henry, if you're done using the potty, maybe you can get off so we can empty the contents in the toilet.
Henry: What is the toilet? No. I mean, what is contents?
M: Well, contents are what is inside something. What's contained in it. Like, we talk about eating food out of containers. It comes from the same word: container - contents. Or look, this magazine has something that's called a "table of contents." Here it is. It tells you what stories are contained inside the magazine.
H: Is the potty a container?
M: Yes, the potty is a container - for poop!
H: Can food be contents?
M: Yes! Like, if I say, "Henry, could you please give me the contents of that pickle jar," you'll give me a pickle, right?
H: (counting on fingers) I will give you one pickle two pickles three pickles and you will eat them up and say Yummy.
M: Yummy. Now can you get off the potty so I can wash you in the bathtub?
H: I don't want to take a bath!
Later, Henry in the bath, to Ken: "Contents are if Mommy asks me for the contents of a pickle jar, I could give her thirteen or fourteen or fiveteen pickles!"