Gift for Grandpa

I’m leaving to Michigan this weekend to see my grandparents, and I’m really excited because I haven’t been up there in a few years.  I want to get my grandpa a gift, but I’m not exactly sure what to get him.  I have it narrowed down to a few choices, but I’m trying to figure out what he would like the most.  He was in the Air Force, so he may like this, but he also loves pirates, so I may get him a mens pirate shirt.  It’s a lot different than the gifts he would get me as a little boy, but we’ve always enjoyed exchanging gifts.  I can’t wait to see him!