A spud gun is a simple device that uses air pressure to launch a potato. It is a popular project for science fairs and backyard experiments. Spud guns can be made from a variety of materials, but the most common design uses a PVC pipe and a bicycle pump.
Spud guns are relatively safe to operate, but it is important to follow all safety instructions carefully. Never point a spud gun at anyone or any animal, and always wear safety glasses when operating one. Spud guns can also be used for target practice, but it is important to use a safe target that will not be damaged by the potato.