Lol there was this kid back in school. Not the brightest lad. Him and another one of my friends were lighting off homemade fireworks.
After one of them didn't go off, Thomas went over and looked down the tube. His face got it pretty good, he didn't have eyebrows for almost an entire school year.
Former friend found a container of gunpowder when we were in 6th grade. He poured it into a fast food cup and tried using a shoelace as a fuse, when that did not work he stood over the cup and dropped in a lit match. 30ish years later he still does not have eyebrows.
I only realised it is legal to own containers of gunpowder after i saw in a rental lease that explosives are banned from being kept on the premise. Sure, ammo for a gun is expected to be allowed here, but straight gunpowder sold by the pound? That took me for a bit of a loop.
It almost makes you wonder why people bother with fertilizer if they can get premade stuff shipped to their front door.
Smokeless powder doesn’t burn particularly well unless it is contained; I.e. in a gun. If you just try to light a container of it, it will burn long enough to burst the container, flinging the bulk of the powder away unlit.
Black powder is moderately effective as an explosive, which is why you are required to have an explosives handling license to buy it unless you satisfy certain criteria for a gun-related exemption.
Gunpowder itself isn't particularly strong as far as explosives go. Like you can probably make a bomb with enough of it packed tightly but you're better off with dynamite.
Fireworks are very legal in many places. Some have time restrictions (ie, it's used on the intended holiday associated with fireworks, the 4th of july).