Watch science in action with this mesmerizing Hand Boiler! Just wrap your hand around the lower glass bulb, and your body heat will cause the liquid to rise and bubble into the top chamber—demonstrating Charles’s Law and the transfer of thermal energy in a fun, visual way.
Made entirely of glass, this classic science toy is both educational and entertaining. A great desk accessory, party trick, or conversation starter—challenge friends to see who has the "hottest hands" to make it "boil" the fastest!
Features:
Demonstrates Charles’s Law and thermal energy transfer
Liquid appears to boil as it rises with body heat
Made of delicate, hand-blown glass
Great as a science demo or desktop toy
Recommended for ages 14+
Fragile – handle with care
