Uploaded January 2009 | Updated September 2026, 1 day ago

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Part 25 is Step 22, making the boat go faster by restricting the straws a little at the end, just like real jet engines and rockets. Finally you can tell the control freak (me) to go soak his head, and you can break loose with experiments.

You can find more DIY science projects like this at sciencetoymaker.org