It's hard to come up with something that hasn't been mentioned, but...
When I was about 12 - 14 I remember taking my B-17 model and propping it up almost vertically below our tree house. Back in those days (1970), McDonalds' straws burned easily, dropping little balls of burning, smoking plastic. They looked just like tracers. To add to the effect, they made a loud, unusual "zzzzzzip", "zzzzzzip" sound as they dropped.
So, obviously, the young MRPLUTO stood 15 feet above the B-17, which pointed almost straight up at him, simulating an attack from 12 o'clock high. I'd lite up the straw and begin "shooting" the Fortress with balls of flaming plastic. The tracer effect was remarkably realistic and cool.
Then, as now, I aimed for the wing root and cockpit.
I believe McDonalds' straws are now made of a much less flammable plastic, so you can't try this at home, even if you wanted to.
MRPLUTO VMF-323 ~Death Rattlers~ MAG-33