Charms are a good idea but need a few tweaks. The art shows through nicely unfortunately it is only one sided and looks ugly from the reverse side. Maybe the art could be placed back to back to be seen from both sides, also the hole is too small for a key ring to fit through it. A bigger hole would make it usable on a key chain or as a Christmas ornament. As is I’m not sure it can be used for anything. Still I like the idea and hope you guys perfect this one

Please tweak