When I was five , my friends watched me pour the powder from a number of firecrackers into the smokestack of my favourite toy plastic locomotive and light it to see the smoke. This was outside and on the sand pile where we played - thank goodness. Mama didn’t allow no messing around in the house.
I saw smoke, but completely destroyed my locomotive in the process. Fortunately I had carefully tossed a lit match (no punk around) and run like hell, so I was not hit by the flying shrapnel. I still remember the smell, flying sand, and small pieces of plastic all over the place. It was DUMB, but I learned a lot from the experience.
Amazing what one can do with a little gun powder and a match.