This reminds me of a small trap club that my friends & I used to go to while in high school in the 60's. We would fill clay birds with all kinds of things and glue a piece of paper on the back to hold it in. When the glue was dry, we trimmed off the excess paper with scissors and gave them to the guy in the pit to throw out randomly. My favorites were dove feathers that we saved from dove hunts, flour, the old IBM card punch-outs (chads?), 2 or 3 small paper airplanes, and the all time favorite, a plastic army man with a small plastic parachute that would deploy when the bird was hit. Great fun!