One of my favorite toys as a child was a Happy Apple. Nine years ago, when my blockchain blogging journey began, I wrote a short post about it.
Given that, I think it would be appropriate to be buried with my Happy Apple. It says basically everything I would want said to any future archaeologist studying history. What a fascinating question! I had to think about this one for a little while (and I love your idea of people trying to figure out what the hell a Leatherman tool was used for, before hopefully coming up with, "Ah, he used this for basically everything!"). LOL!
RE: What Should Be Buried With You?