In the 1950s we had cap guns. You loaded a roll of caps into the metal toy gun, and when you pulled the trigger it would move the paper roll with the tiny packages of actual gunpowder into position, at which point the metal whatever it is that you "cock" before firing would slam down, resulting in an ear-splitting report. It wasn't long before we figured out that if didn’t mind burning through an entire roll in one shot, you could put it on a concrete floor and bring a hammer down on it for a REAL BLAST!