Haha I had one of those too. I recently pried it open, and in the secret compartment I found a scrap of paper that said "I <3 ____" with my current boyfriend's name written in the blank. Apparently he was my 2nd grade crush and I had forgotten all about it! After all, we are both close to graduating from college now. Couldn't believe it when I found it lol
For the life of me, I can't remember the password :c
and it worked