Haha. My family and I are big on this. We went on a trip from about San Diego California to San Fransisco CA and found a TON of change and small bills. The whole trip (which was about 3 days) we'd get out to strech legs and hear "OMG LOOK WHAT I JUST FOUND!." Buttons, rings, earrings, notes, boxes...
We stopped off of the I 5 to 'whale watch' and found $5 in quarters and dimes.
If Im not mistaken, we found about $40 in change between the 5 of us.
We even had a chance to stop at a lighthouse (a rare thing for people in CA to see) and we saw an old phone booth with the rotary phone. It still worked. The best part was when my 12 year old sister asked "Um, what is that thing?" Oh how I love explaining the 'old days' to someone only 10 years younger than me. =D
((I know that had nothing to do with the thread but I thougt Id share))