Gage built a lego ship with a little lego guy steering it from the back. It was only one-prong wide and so I said, "Cool one-dimensional ship!"
"Mom, I need to ask you something about that - what is four dimensional?"
I have no idea! I should google that. In fact, after I hit publish I will. But anyway, we chewed on that for a bit, trying to figure out what four dimensions would be when Gage said,
"Oh, I know! Four dimensional means you are a person with fat on you!"