1. Obtain a list of materials:
2 tennis ball cans with tops
12 inch strip of duct tape
1 pair of scissors
2. When we condtructed our cannon, we paid more attention to our angle instead of the "double barreled combustion chamber concept". So we cut a hole in the side of one tennis ball can at an angle, andstuch the other tennis ball can in there at the correct angle. That was the basis of our cannon.
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