I've also taken to collecting the pressed pennies, nickels & quarters that are offered at Disneyland and Disney's California Adventure. These are rather interesting, and some of them are really great! They're also a (relatively) inexpensive souvenier from the parks. It costs $0.51 to squash a penny, and $1.00 for the quarters. And one of those coins is the one that gets squashed.

(Click on the thumbnail image to see a larger image)