What did I lose that I wish I still had?

A question that I saw when I logged into livejournal. I'm responding to it now...

About a year ago, I had my school bag stolen, all of it... Luckily, nothing of value was in it. The bag was heavy because there was an algebra textbook in it, and it was about three or four editions out of date... There was also a Nalgene bottle, a scientific calculator about six years old, a half open box of facial tissues, a bunch of napkins... But, in that bag of stuff, I lost the pencil case that I made when I was in grade eight in metal shop... I had a field day with the unit on sheet metal, and I made a lot of stuff with sheet metal, including a pencil case, complete with oxidization. I cannot turn back time to make another one and use it so that it oxidizes, and even if I make one now at the metal shop again, it's not the same... Yes, something that had sentimental value was taken.