Such a perfect gift for your 16 year old new driver. I have hand stamped a heart around the year on the 2008 penny and "Sweet 16" on the back aluminum piece. Be sure to check out my other items to see what I have to offer.
Aluminum will not tarnish or change colors and has a lighter weight than stainless steel. I use real coins so they will tarnish over time as any coins would do.
Due to the hand stamped nature of each piece, being stamped one-letter-at-a-time, there may be slight differences in letter placement and spacing. This is not to be considered a defect. The differences are what gives the unique character to each piece.