Two of my high school friends were brothers who's family owned a neighbourhood market across the street. I'd hang out there after dinner when one of them had to mind the store.
Good old airplane glue was kept on the shelf until it's sale was prohibited. There were three 10 or 12 year old boys that were always, always buying multiple tubes of glue every day. When the glue disappeared, the trio disappeared too. For a short while and then they came back. Now they were buying boxes of wooden matches.
It was obvious why they were buying glue but matches was puzzling. So I followed them into a nearby vacant lot. I watched them use the matches to light pieces of Styrofoam and inhale the smoke. Thick, black smoke with big particles of Styrofoam soot - they sucked it all in.
No idea if any of them reached the ripe old age of 13 without serious lung damage. Unlike other things, I was not compelled to learn what kind of high you got from inhaling Styrofoam smoke.