Your 6 year old son sets out a bag near the front door with a sign above it saying "25cst". I look in the bag expecting to see a thin 10wt. oil, but find a couple of quarters instead. Huh???? Then he comes running up saying I'm not allowed inside unless I pay the 25cent toll. When asked why I have this stupid expression on my face, I told him he'll understand in a few years .