When I think about some of the toys I played with, I'm surprised I'm still here - and even more surprised I have 2 eyes & 10 fingers.
I had a rocket that was half filled with water, then attached to an air pump. When there was enough air pressure, a lever released the plastic rocket - which shot up 80-100 feet.
Then there was one of my favorites - a double-barreled cap pistol that held a whole roll of caps & advanced to the next cap with each trigger pull. I learned to fire the whole roll really fast, & the barrels didn't have a chance to cool off & they started to melt.
Then there were those metal cap bombs that were thrown up into the air & when they landed on the weighted nose, the stick-on cap would fire. I quickly learned it was much more exciting to stack 9 or 10 caps, except the big explosion caused the bomb to jump back up at high speed, narrowly missing my head.