What is the coolest thing you have ever found and kept?

What’s the coolest thing you’ve ever found (and kept)?

What is the coolest thing you have ever found and kept?   When I was living in the Charlotte Mecklenburg County Area in North Carolina, I found $40.00 dollars at the Bank of America Stadium in 2008.  This was during the time that I was working at the Stadium as an Usher for 18 months.   I found some money inside of the Post Office parking lot and I turned it in to the Police Department in Charlotte NC.