Part 11 Build a Putt PuttPop Pop Steam Boat s8 straw in

  sciencetoymaker
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Part 11 is Step 8, using a thumbnail to open up the end of the "pocket" a bit, then pinching the end of the long part of a flexible straw and pushing it in. Then the long part of another straw. Push all the way in, but not so hard them split the other end

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Part 11 Build a Putt PuttPop Pop Steam Boat s8 straw in
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