BillyBot Coin2 Robot GreenBack

The idea of this coin is for people to 3D print them and drop them into GeoCACHE's around the world.  Assembly is easy, the center space is for a small coin like a penny so the BillyBotCoin2s can be found with a metal detector too.  I'm using Gorilla Glue to glue the obverses to the reverses.  This idea lets people create metal detector GeoCaches too.