mysterious

These days, most of our really great conversations take place in the car. It seems I've neglected to jot them down the past little while. Today, though...

Z: Mommy, I'm drawing lots and lots of pictures for you.

M: Great! I can't wait to see them all.

Z: Well... I am making them all different and mysterious so you won't know what they are.

M: Where did you learn the word mysterious?

Z: Oh, that one? I just made it up. It's a good one, huh?