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Science toys: Make a putt putt steam boat
(
sciencetoymaker.org
)
5 points
by
ColinWright
on June 11, 2011
|
past
fascinating hand-held origami hang glider (watch the first video)
(
sciencetoymaker.org
)
100 points
by
jashmenn
on June 10, 2010
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past
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9 comments
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