I have always been fascinated by how things work and approached things scientifically, my experiments tend to be less dangerous but only because I now have more knowledge than I did as a child. We used to make black powder bombs with homemade black powder, first with lit fuses and later with electric detonators but later in life when I required explosives on a heavy construction job I would bring in professional powder monkeys to do the job with blast mats. Just as an example.
It's not dangerous if you know what you are doing.

At age 8 or 9 I tried to repair a bed warmer which was basically a light bulb in a metal case. For a second or two I held a live hand conductor but somehow manged to shake off the 240 volts. At age about 50 during a medical checkup with a BCG,they discovered a diagnosis of LEFT Bundle Branch Block, a heart condition in which electricity finds its way to the muscle by its own rout and not the usual rout . It has no effect on my life except [as it mimics the results of a heart attack] I have to warn the medical staff that I have the condition which they would assume I did have a previous heart attack

I accidentally started a gasoline fire when I was 14 that blistered 25% of my skin off from second degree burns.
I've been smoking ever since.
I smoke Cools though to keep the temperature down.

Everyone is. I think it's a well known thing, no?

At age 15, I sneaked outside at midnight and skated alone on thin ice. Skating in the glittering path of the full moon, I felt exhilarated by speed, danger and exquisite beauty. “Craack!” the ice shrieked beneath my feet. Long cracks fanned across the ice. Nobody knew where I was. “I’m lightweight,” I thought and skated faster.

It occurred to me that if I fell in, my dead body would wash up in the Spring, maybe never. Quickly I skated to the shore and made my way around the lake to home. Never told a soul until age 35. “Don’t tell me that NOW!” my mother gasped, horrified.