I've collected a variety of coins and bill from around the world. Some are interesting, some are boring, most are well worn, and I doubt any are really worth much more than face value. Still, it's interesting to see the different coins and bills, and learn the histories behind them.
I was once given a book called Free Stuff for Kids, probably in 1997 or 1998. One of the things listed was Heaven Money, bills that could be placed into a casket with the intention of them being used in the afterlife. As someone with a meager coin collection at the time, I was intrigued. I wrote to the Heaven Money Club, and recieved this collection of bills and three pages of explanation about them. Unfortunately, I have been unable to locate the organization on the Internet, and wonder if it is even still around.