Use an old VHS cover as a picture frame with hidden storage. I think this would be cute for each kids room in the hall by their door. You can put their mail they receive in there and also write them notes too. Or hide pieces of candy, small toys, etc in there with a note attached. Letters from Santa could go in there or even elf on the shelf!
Why have I never thought of this????OMG!!!! this is AMAZING .... PURE GENIUS!!!!! A trick for hanging photo collections: Lay out your arrangement. Flip frames over. Lay waxed paper on top of frames. Mark hanger/nail spot on waxed paper. Flip waxed paper over and tape to wall, nail into wall where indicated. Tear down waxed paper. Hang photos.-- Found this ONE day after I spent HOURS hanging a "gallery wall"