This is pretty cool actually, nice fun factor and could be fun to do with the kiddies. It gives me an idea also - I like to do a little metal detecting and of course I find mostly pennies here and there. Maybe once I have a good handful I'll start putting them in a cheap folder and see if I can make a set only from digging them up. The challenge is that I've dug up some Zincolns that are partially rotted so I'd need to find at least mostly intact ones that stay in the folder, haha.