I'd had some framed square pictures with dried flowers and a Bible verse in it - they were a wedding gift and something that was nice, but just not my style to begin with, but I'd hung them on the kitchen wall because I could (note to self: not a very good reason). I was considering buying some frames for my skeleton key art when I remembered these lonely frames!
The art was easily removed and I popped the glass out. I trimmed a small piece of white burlap to fit the square, and then I just refitted the glass and a piece of cardboard to the back - that way if I want to redo these frames again (or donate/sell them), the exact glass is there, but doesn't bother me a bit in the meantime. I flipped them over and hot glued the keys straight to it. That's it!
I rehung them next to my DIY kitchen pegboard and their value has increased 100 times to me - even though it didn't cost me anything at all. (And I actually like them now, ha!)