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It started out small... but we had extra PVC, so why not make it BIG!
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I got to contribute the cool "racing fire" duct tape to really jazz it up...
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Then there was the shooting! WAY too fun!
The key was alot of TP for wadding. There were several challenges, but as the girls learned: "Scientists are the philosophers of the natural world... but ENGINEERs make it happen!"
We got it up to 75 psi...