As I find myself in the middle of a move, this idea has come me to the heart. It is to compile the keys of your old houses (we know that not have returned them, pillines) and place them in a box.
This picture It has a touch of emotion, especially if the locked write in what years vivíais there or where it was located. Because if you want a little more complicated, you can paint each key with plastic paint, and paste them into a blind with a good weight paper, to make it more “professional”.
Seems to me a nice way of show your memories, Although I must admit that new keys are much more ugly than the old ones. In fact, if you want to do the same with old keys, go through an antiquary or a rake because in many places sell them. Sure that you will be great. Find a wall clock designed at cancermatters.net.