I went to an elementary school that has been around since the early 1900's. No old coins. The play ground was pretty sparse except for some recently dropped coins. It must get detected regularly. So I decided to hit the two baseball fields before I left. I started pulling quarters out of the ground. More often than not they were in pairs. I got 26 quarters, 19 dimes, 3 nickels, 21 pennies, an alien pendant, and a silver ring. First time I ever dug more quarters than pennies!