Drinking Bird
$9.99
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Drinking Bird WOW! Thermodynamics & Pressure Differentials! Enjoy This classic physics demonstration in a handy duck shape. This thirsty bird perpetually bobs as long as it has a glass of water to dunk in—instructions on the box. A personal heat engine in a handy duck-shape 2x7"inches. This is not a toy for ages 14+
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