Yes, you read it right...I built some prototype launchers for a client based on their line of Poop-themed collectibles. These quick turnaround creations were made with craft sticks, rubber bands, bottlecaps, clothespins, anything I could lay my hands on in my little shop.
More experimentation to reduce complexity
Final design (Blue, Green, Black) used some parts from a construction kit and I added a squeeze bulb and 'fart valve' so the Poop-a-pult would have an appropriate sound effect when launched. The other prototype pictured was for size comparison.