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zombie pop pop boat

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Uploaded on Nov 27, 2009

Pop Pop boat. An aluminum can, a couple bendy straws, 2 part epoxy, hot melt glue, a styrofoam meat tray, 6 pennies, a couple rubber bands, aluminum foil, and a cut up birthday candle+ 3 hours with or without your kid on a rainy day and you get this pop pop boat... lego zombie added for humor value. Thanks to the genius at http://www.sciencetoymaker.org for the easy to follow instructions, all parts of which are presented in video clips here on youtube!

as far as my understanding goes, it's a rudimentary steam engine... the aluminum can forms the 'engine' which is 'primed' with a little water... when the droplets of water inside are heated by the candle flame, they flash to steam and that pressure blasts through the straws under the boat creating a little thrust. The pressure also causes the metal to flex, making a pop noise as it expels the steam. Another pop noise is created as the metal returns, and at the same time acts as a diaphragm pump, drawing more water through the straws and repriming the engine. Pop pop pop until the candle burns out!

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