(1) small roll of duct tape
(2) 8 inch lengths of 1/2" vinyl tubing
(2) 6 foot lengths of latex rubber surgical tubing
The vinyl tubing can be purchased from a hardware store. The latex rubber tubing can be purchased online. One good source is McMaster part number 5234K75
. It should be 3/32" wall thickness (not 1/16" thick). The surgical tubing sold at hardware stores is normally only 1/16" thick and not strong enough to launch a balloon 300 yards. If you are in a pinch and don't have time to order the thicker tubing, then you can double-up the 1/16" tubing, but that gets quite expensive.