When you drank your milk, you could flatten out the foil cap and flick it like a frisbee using your "fuckoff" fingers.
Then there was always somebody collecting the foil caps in an old pillow case "for the blind dogs."
Aha ! a small piece of paper, crumpled up and chewed to about the size of a pea could be dipped in the inkwell, and then flicked by elastic band or a springy 12" ruler at somebody you didn't like. It didn't show on a dark blue blazer, so you tried to hit skin, or a white shirt.
Sports Days - all the teachers blotto on Pimms by 11 a.m. including the starter with the .455 Webley.
The acme of 1970’s classroom weaponry technology was a suitably adapted 12” ruler. I’ve just tried to make one to show and tell here but a) the only 12” ruler in the place is some shite, floppy “shatterproof“ job, not your good old stiff wooden job, and b) I couldn’t find a clothes peg, rubber band or drawing pin. What happened to draws full of all that kind of stuff?
Anyway, written instructions:
Take one 12” ruler, it must be rigid or the launch system tensioner will just bend the ruler and you’ll blow your balls off.
Put a drawing pin through one end ( the “muzzle” end) and loop an elastic band under it.
Attach a clothes peg to the other end, pull the elastic band back and hold it under tension beneath the clothes peg.
Load with projectile of choice, dried pea, road grit, inky paper, rolled bogies etc. placed just in front of clothes peg / band.
To fire, open the clothes peg.
Write out “I will not act the c*nt” 100 times, lined paper, best handwriting, during afternoon break.