The oldest thing that I have which I think counts as "technology", and hasn't already been listed is a steam-powered car. The Mamod S1-roadster, circa 1977: h

The oldest thing that I have which I think counts as "technology", and hasn't already been listed is a steam-powered car. The Mamod S1-roadster, circa 1977: https://en.wikipedia.org/wiki/Mamod#Roadster_SA1 https://en.wikipedia.org/wiki/Mamod#Roadster_SA1 Fill the tank with water, light the fire, and eventually you get a car that will drive round in circles. Complete with working steam-engine. I've had a few (static) steam-engines over the years, but this was the only want that survived the move across countries. One day I'm gonna share it with our child, but for the moment I think it'd be a little too dangerous.