It went like this:
Me: Cool! Look at that. Pretty awesome crayon drawings, huh?
Sweet Pea: What?!? That can't be crayon! You can't do that with crayons!
Me: What? What do you mean? It's right there! Of course you can do that with crayons. *I* could do that with crayons.
Sweet Pea: No you couldn't. It's not possible!
So of course I took that as a challenge. I got out my box of 24 crayons and some paper and set to work. And, ha! I proved my point. It is possible to do art with crayons! Not too bad for my first try: