Sep 07, · Light a match and insert the lit match into each hole to melt a little bit of the plastic. This step is important because the plastic will cut the tubing if it has sharp edges. Cut the surgical tubing in half and tie the tubing into the bowl like this: .
Firing DIY Water Balloon / Potato Cannon Science Project
May 31, - Build this PVC water balloon cannon with cheap and simple parts so that you can win the water war and strike fear into all those who seek to. Method: 1) Use your scissors to cut off one leg of your jeans just beneath the knee - this is all the material that you'll need and will become the launch pad of your slingshot. 2) Tie the two ends of your elastic rope together in a tight knot, so that you're left with a .
Water Balloon Launcher Step 1: Materials. The vinyl tubing can be purchased from a hardware store. The latex rubber tubing can be purchased Step 2: Pouch Layout. Attach together 5 pieces of duct about 18 inches long. Fold over the top and bottom edges about Step 3: Add Tubing Channels. Place.