Thermodynamic Drinking Bird

Almost everyone remembers this hard to find toy with at least a twinge of nostalgia. Now, the ‘Drinking Bird’ is back, disguised as a great demonstration of thermodynamics.

When the head of the bird is moistened with water it will repeatedly tip over and appear to be drinking from a cup placed in front of it. The dunking is due to the evaporating water, which cools the head reducing the pressure of the gas inside. The liquid inside the bird rises up from his tail towards his head, causing the bird to tip and appear to be drinking. As the bird dunks, the liquid returns to its tail, and the process begins again. In essence this is a small, cleverly designed thermodynamic engine which only needs water to run!

Features:

• Classic, nostalgic toy
• Appears to drink from a cup of water
• Demonstrates a lesson in thermodynamics
• Must-have for science teachers
• Ultimate desk toy
• Runs without batteries

WARNING: This product is not a toy and is not intended for use by children under 8 years of age. Use under adult supervision. Avoid breaking glass, contains methelene chloride and may stain clothing and other surfaces. Do not swallow or allow to come into contact with eyes. Flammable. Keep away from flame and other heat sources.