Well we all know the fly killer no. 1 They are inexpensive square plastic rod with a plastic square. The last 10 I bought broke. But never the rod. So heres the start of my collection of costume fly killers.
I put the file aswell so its easy to make your one design on it. maby alter the holes its possible to make one that only kills adults :-)
Hope you have fun with it :-)

First one named "got you fly"
Second "big chance" A Buddhistic killer for good karma.
third "Blood bath" Kill them and make a mess.

Print
Attach to old rod.
KILL KILL KILL