Heavy rubber band as a crossbow—index finger and thumb, tightly folded piece of notebook paper. Now that was a weapon. They would call the FBI on me today; it’s an IED!
Oh yea, we had the HEAVY rubber bands. Paper clips were sometimes used as projectiles, but never at people, just metal wastebaskets.
I used to use folded paper clips as the projetile. Stings like hell and leaves a mark.
Ruler, heavy rubber band (or multiple regular ones braided) and a pencil. A ruler even has a built-in channel to guide the projectile. We built some admittedly pretty dangerous devices in class.
We did the same thing only we used halved paper clips.
That would be a death penalty offence today. On second thought the weenies today don’t use the death penalty so I would be OK.
Wooden match, head removed, needle at one end and tiny cross fins in the other. They’d stick in the ceiling every time and have to remove with a broom.