The Drinking Bird, also known as the Dipping Bird, is a physics toy that works by using temperature differences to create pressure changes, which then cause the bird to move. I initially dipped the head of the bird into water. Then the process goes like this. 1. The water on the head evaporates, cooling it down. 2. The cooler head causes a drop in pressure in the head. 3. The warmer base, with higher pressure, pushes liquid up the bird's neck. 4. As the liquid rises, the bird becomes top-heavy a

Drinking Giraffe Heat Engine: a rare vintage version of the famous drinking bird heat engine- but in the form of a long necked mammal! With four legs instead of two the physics is the same- cooling by evaporation at the head leads to lower pressure in the top bulb such that the volatile fluid rises up the neck making the giraffe’s neck top heavy and the critter tips over dipping its face in the water and letting the fluid return to the bottom bulb. The process repeats as long as the top stays we