The Galileo Thermometer, invented by Galileo Galilei in the 17th century is a thermometer made of a sealed glass cylinder containing a clear liquid and a series of sealed glass balls with different densities which could rise or fall as the temperature changes. By doing that, the balls form a temperature scale.
This mini 15cm scientific marvel Galileo Thermometer consists of 3 balls and great to kids to discover the physics of density and flamboyancy.
