Oh. My. God. Bless me Father, for I have led a sheltered life!
My wife and I have been LOAO at the postings in this thread! Miriam looked at me and said "When I was 10, I blew up my parents laundry hamper." She used a cherry bomb placed in a tin can. Miriam's an Army brat and at the time her father was acting Provost Marshal at the Presidio. Her folks were at the O club, she was babysitting her siblings, and craving some excitement.
My own weapon creation adventures are mundane compared to most. A firecracker cannon (6" length of 3/4" copper pipe, capped at one end with a small hole for the fuse. For ammo, we used seed pods from the bay trees in the area) and little smoke bombs made from phosphorous tipped match heads tightly wrapped in an aluminum foil ball. CAREFULLY cut a small hole in the ball and then throw it on pavement or asphalt.
My own bow was a regular longbow, made of lemon wood with a fiberglass 'spine'. Spent quite a bit of time practicing with it.
I also had one of those 'David' style slings. Timing the release on that sucker is akin to patting your head while moving your other hand in circles over your stomach.
Spud guns. Hmmm... There's PVC in the garage and I KNOW we have some hair spray around here! <G>
Cliff