This is a neat idea I had, where you light candle at both ends then spin it lightly so that as the candles melt separately they try to balance by spinning.
Made out of k'nex!
Spinner.mp47 MB
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Signing UpStep 1Parts and Tools
Tin foil,
a tall candle,
a lighter,
a long, thin, straight nail,
a knife,
a cutting board,
and
4 gray k'nex pieces
2 Red quarters,
32 purple quarter-spheres,
4 half-moons,
16 half-sphere,
2 circles,
6 short green rods,
45 short white rods,
30 blue rods,
4 yellow rods,
12 orange rods (with the little separation at each end, though normal red rods would work).
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if you look in the pictures of it inside on a tray, you can see we replaced the bent nail with a smoother, straighter one.
(btw, my original comment was a joke on "burning a candle at both ends")