Cracker Jack - when I was about 5 years old, I got a little brass trumpet as the prize in the box. Shortly thereafter, it slipped out of my hands and flew into my mother's grand piano and disappeared. I always knew it was in there, but could never find it, which always nagged at me. 32 years later, I moved that old piano to my basement as she no longer had room for it. One night I was working on it, and my work light caught a little glimmer of something down in the sound board. There it was! I fished it out and it now has a place in my little box of treasures.
I love that. I bet your little box of treasures holds many special things!