Love this idea! Did you make it? What are the dimensions of the frame?
I did -it's a 2.5" x 3.5" frame from Hobby Lobby. I bought a ton of white ones and just spray painted the frames and keys to match. Here is the link for the frame: http://www.hobbylobby.com/Home-Decor-Frames/Frames-Photo-Albums/Picture-Frames/White-2-1/2%22-x-3-1/2%22-Bright-Glossy-Baroque-Resin-Frame/p/41591
What did you use for the address and date on the key? Permanent Pen? Like a sharpie?