Well, my Mom's side showed me a lot of their old photos, they had a whole box full because my Grandpa is really into Photography. (Going to post some of his old photography later!) On my Dad's side, since they didn't keep a lot of 'old' things, my Grandpa showed me his collection of his old watches.
My Grandpa offered these to my brother, but he only wanted to look at them and I didn't feel right just taking them. So instead I took a few pictures.