The Drinking Bird

Description:  The drinking bird is a toy heat engine.  The source of energy in this phenomenon is a mystery to most students.  It is said that Albert Einstein and his wife Elsa were fascinated with this toy when they visited Shanghai in the 1920's. 

Web Resources:  The Engineering of the Drinking Bird, The Drinking Bird - Wikipedia
 

 
STANYS__Nov_2017__-_Paul_Andersen_Institute.jpg