I don’t recall having a cap gun when I was a kid. But when I could get these 20 grain caps, I put them on a big rock, and hit them with another rock. The guns were not needed, “cops and robbers” consisted of chasing each around on our Schwinns, and if you were a “cop” you were supposed to make a whooping “siren” noise.
Kids in the 1960’s were easily amused, and parents in the 60’s had a second martini.