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I made a super simple launcher and drew up some rocket plans for my daughter's birthday party. I shortened the body tube so that the whole rocket, including nosecone and fins, could be made out of a single sheet of paper. For the launcher, I eliminated the bits that keep it standing and the attachment to the bottle; instead, I just held the launcher in place and held the bottle onto the pipe, my hand acting as a gasket to seal the joint. It worked fine and none of the kids accidentally stomped my hand!

I made a super simple launcher and drew up some rocket plans for my daughter's birthday party. I shortened the body tube so that the whole rocket, including nosecone and fins, could be made out of a single sheet of paper. For the launcher, I eliminated the bits that keep it standing and the attachment to the bottle; instead I just held the launcher in place and held the bottle onto the pipe. It worked fine and none of the kids acidentallystomped my hand!