This is a classic example of thermodynamics in action! The heat of your hand warms the bottom bubble, causing the air in the Hand Boiler to expand. Liquid is forced into the top bubble, making it appear to boil for an exciting demonstration!
• Comes with a Teacher’s Guide
• Glass construction with 2 bulbs connected by a spiral tube
• Assorted colors

Item 2010-10

In Stock

This is a classic example of thermodynamics in action! The heat of your hand warms 1 bulb, causing the air in the hand boiler to expand. Liquid is forced into the other bulb, making it appear to boil for an exciting demonstration!
• Comes with a Teacher’s Guide
• Glass construction with 2 side by side bulbs connected by a straight tube

Item 2010-20

In Stock