Those are super cool commercials.
I remember in 4th grade taking two (DEWAT) hand grenades to school for show and tell. I asked the teacher if it would be ok, and she deferred me to the principles office to ask him. He said I had to bring them in a locked box and keep them in the cloak room in our class until show & tell. Other than that, it was a ok. I was even allowed to hold onto the key. They were the hit of S&T and I had a lot of questions about them, even from my teacher. I took one concussion and one fragmentation grenade. They still had the springs and everything in them.
Those were the days! (1971).