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The Thermodynamic Drinking Bird

$9.99

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+