Hand Boiler

A classic science toy that is sure to please. As you wrap your hand around the base of the hand boiler the blue liquid will appear to boil within the beautiful glass vessel. This demonstrates Charles’s law and energy transfer perfectly! This makes a great desk accessory as well.

Hand Boilers are looped and twisted glass sculptures containing a liquid that will "boil" as heat is transferred from your bare hand. Simply hold the large bulb end in the palm of your hand and within minutes, your body heat will cause the liquid to rise. - Once out of your hands, it takes a few minutes for the liquid to cool down and return to the large bulb. Pretty fascinating science toy and an excellent demonstration of energy transfer. 

Ages 8+