The drinking bird, also known as a sipping bird or dipping bird, is a simple novelty that appears to "drink" water from a glass repeatedly. Dip his head in the water and watch the magic begin as the water rises and the bird starts to bob up and down in what appears to be perpetual motion. Keep a glass of water in front of the bird full at all times so that the bird continuously keeps his beak wet. The drinking bird consists of a glass tube filled with colored liquid, typically water, and a hollow glass bird attached to one end. The bird has a porous head made of felt or another absorbent material. The drinking bird demonstrates the principles of thermodynamics and serves as a fascinating example of a heat engine in action. Some may consider it a toy, but it is not for kids under 13 years old.
