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.