GENIUS!

My son got a whistle in a party bag. It's two-cents worth of loud, shrill and piercing plastic.
   On an eighty-mile drive I only made it a couple of miles before I told him to stop with the whistle.
   Today after about fifteen minutes of hooting I asked him if he thought he was tough. He is eight. Of course he is a tough guy.
   "Oh yeah? I bet you a dollar you can't even break that whistle in half."
   "Really? A dollar?"
   "Yup."

Smartest dollar I ever spent.