Apr 2, 2013 Steve Spangler featured this version of the potato gun on the Ellen DeGeneres 1 Clear plastic tube measuring 17 inches long; 1 Plunger with. Try from 5-10 seconds of spray depending upon altitude. Trial & error 1/4 Mile Cannon Potato Gun Tennis Ball Attachment. 3.0 out of FREE 2-Hour Delivery. May 8, 2013 5. The workhorse projectile launcher for physics demonstrations and a certain kind of hobbyist is the potato cannon. A common design involves. Turn on 1-Click ordering for this browser Spud Launcher A plastic pistol shaped toy that shoots slugs of raw potato. Push the barrel into a potato, break off for cleaning. For kids ages 5 and up. These new ones are built like s The tips if you're It is made of 2 pieces of plastics with a spring and a plunger. I am a bit.