While Twila and Nikki are pretty cute pretending to be people, I happen to think this little person's obsession with tooth brushing is even cuter. She really loves having her teeth brushed. And brushing your teeth.
If she ever sees one of us brushing our teeth, she just stands and watches with a funny little half smile on her face, and then after a few moments demands to brush your teeth for you. Which doesn't actually clean your teeth, but it keeps her on your lap for a while.