In other neat things happening in our house, Scott bought some uncleaned Roman and Greek coins from digs in various countries, and here he is cleaning them.
Ancient bronze coins are surprisingly inexpensive. They're just a few dollars, especially if they haven't been cleaned. Cleaning them yourself is not easy. Some of that dirt has nearly started to fossilize, but it makes you feel a bit like an archaeologist. Or more accurately, how you imagined an archaeologist felt when you were a kid. It's fun.