However, it's not entirely wise to let small people play with explosives or high-pressure gases. At least, not without me there to, er, supervise.
Enter the Pneumatic Potato Pistol - pocket-sized ballistic mayhem.
Step 1: Tools and materials.
- Hot glue (or epoxy)
- Cutting and grinding tools - either a hacksaw, file and sandpaper, or a rotary tool with appropriate bits.
- Safety gear - you will need goggles if you're using a rotary tool on the pen, be careful around hot-glue, and read the safety instructions on the packet if you are using epoxy. For the safety equipment needed when you use it, check the video in step four.
- A large syringe. I acquired mine from school, but you can sometimes get them from pharmacists - ask for large oral syringes.
- An old biro or similar stiff narrow tube.
Step 2: The Barrel
Near the closed end of the pen, drill a hole large enough to take the syringe nozzle. Note that the syringe I am using has a wider diameter near the base of the nozzle, and that is the diameter I am working to.
If you are planning to use the pistol to fire actual potato, grind the open end of the pen to a slightly chamfered edge. It doesn't need to be razor sharp, it just makes it easier to push into your spud.