Things You'll Need
Instructions
Drill four holes (two on each side) into the top rim of the plastic funnel. The holes must be 2 inches apart and opposite each other.
Use the knife or scissors to cut the tubing into two 10-foot sections.
Thread the tubes through the first hole from the outside in and then through the second hole from the inside out. Repeat for the other side.
Get two friends to hold each of the rubber tubes. Stand in the middle and hold the funnel. Walk back until you have stretched the surgical tubes as far as possible.
Load the funnel with a water-filled balloon, aim and fire. Reload and repeat.