We used to make bolt bombs as kids. You needed two large coach bolts and a big nut. The nut screwed on a couple of threads then the cavity filled with match heads, a mix of red and black types. The other bolt screwed on carefully as tight as you could, then thrown into a hard surface. If you got any material in the threads they could flare in your hand as you tightened it up, so we had an early lesson in safe working practices!
Living in a rural community we had unlimited access to crow scarers. Twelve on a rope which was hung in a tree and lit to smoulder, the banger’s fuse was lit after an interval and the things went off like a twelve bore. Removed from the rope they made brilliant throwable bangers, albeit with a very short and unpredictable fuse. A mate built a mortar tube that could fire of all things a crow scarer inside a sausage. One underneath in the tube would launch the exploding sausage into the air and experimenting with fuse lengths meant an impressive air burst.
Best effect was a crow scarer in a tub of sweet and sour sauce inside a phone box.