We have lunch every Friday with the 5 generations of family (My great-grandma, grandma, mom, me, and my boys). Grandma and I are sitting with Isaac waiting when I look over and Isaac has his finger up his nose like he's trying to touch his brain.
Kate: "Honey, don't pick your nose, it's icky. Can I get you a tissue?"
Isaac: "No thanks, Mommy. I will just pretend that my finger is a tissue."
(Grandma is just about falling out of her chair laughing as she digs for a tissue in her purse.)
Grandma: "Here is a tissue. Would you like to at least wipe your finger off with it?"
Isaac looks at the booger on his finger and contemplates this option, looks up at Grandma and flicks the booger off to the side assuming that we are both not RIGHT THERE LOOKING.
Isaac: "No thanks. It's all gone now."
I bet you can't wait to have a 3 year old :)