My elder son, who is 32, has the Schott Brothers motorcycle jacket I was wearing the day he was born. (I was at work, at my West Baltimore firehouse, when my wife went into labor prematurely at home. I got on my Kawasaki and rode directly to the hospital, while my in-laws drove her there. I got there just in time for his birth.)
I have the valve lapping tool and soldering iron my Dad used to keep his '34 Ford running.
I have three helmets from various stages of my career, along with uniforms I wore and other fire service artifacts.
In 1977 or so, I bought a brand-new Guild D-35 guitar. I used to sit next to my sons, when they were babies in their cribs, and play it gently while they went to sleep. I have a photo of myself, taken in 1982, playing that guitar in my firehouse. It sits in a stand in my home now, and I still play it almost every day. My elder son, who is a far better guitarist than I've ever been, will get it some day. (My younger son, who is a federal law enforcement officer, will get my guns.)