Family: PROVE IT

Here's the cute saying of the moment.  My daughter has adopted a phrase from her book about Arthur teaching his sister, DW, to read (or, learning that she can already read).  Now, when you say most anything to her, she replies with, "Prove it!"  Even more endearingly, when I reply to her, "No, you prove it," she changes her instructive-tone into a nice, friendly response, "Okay, I'll prove it to you."  Books are good.