Step 1: Materials
-PVC tube: diameter of 1 cm (0.39 inch); Length can range from 20 to say 100 cm (7.9 to 40 inch). Longer barrels are more accurate, but harder to carry around in combat and require a longer breathe to operate.
-a pair of scissors
Step 2: Barrel
Step 3: Projectile
-Turn the strip of paper into a cone:
-Put adhesive tape on the apex to keep the paper together
-Slide the cone into the barrel and trim its end
Step 4: Blow
Put the cone into the tube, aim and blow.
Wear safety goggles when playing with your friends.