Is there anything in your family that has been passed down from generation to generation, or from family member to family member? What is it? And who do you plan to pass it on to?
My grandfather gave me a Remington Model 1900 shotgun that originally belonged to his grandfather's brother (meaning it belonged to my great-great-great-uncle). It's a double-barreled, break-action 12 gauge with two triggers. That shotgun is over 105 years old now. When my grandfather was a young kid, he lived at home alone for a while. Some kids from his school were sneaking around his farm and trying to scare him, so he grabbed this shotgun and went chasing after them. They ran off into the corn and he started to fire off a warning shot, but in his excitement, he accidentally pulled both triggers simultaneously and the recoil knocked him back on his ass. The kids never bothered him again.
I also have a near complete set of Morgan Dollars which originally belonged to my great-grandmother. I have two coins from 1878, one I keep with the rest of the set and the other I carry around in my pocket as a good luck charm. It's worth at least $25. I've also got a 1911 gold quarter-eagle coin with a face value of $2.50; it's worth several hundred dollars today. And there's a bunch of lesser coins, including a Carson City silver half-dollar and dozens of silver Mercury dimes.