Then hang your new key shadow boxes in your home. I had most of my supplies on hand but I definitely think you can make a pair of these for less than $10 by stalking your local thrift stores and flea markets.
I actually hung mine up in the bedroom next to my knock off decorative mirror from a plate charger. Knock offs gotta stick together right? Plus I can smile at these each night before I go to bed. Win – win.