🌡️12 Assorted Scientific Hand Boiler Glass Heat Energy Transfer Science Toys ✨

🌡️✨ Scientific Hand Boiler Set (12 Pack) – Watch Heat Turn Into “Magic”! ✨🌡️

Ever wanted to hold “energy” in your hand? Now you can. This classic glass science toy uses simple heat transfer from your palm to make the colorful liquid rise, bubble, and climb into the top chamber like magic. Once it reaches the top, hold the upper bulb and watch it flow back down. Repeat forever. Science reusable magic.

This listing includes 12 total hand boilers — each one a different shape and color. You’ll receive 3 of each of the 4 styles (12 total per order) Perfect for classrooms, desks, gift bags, or anyone who loves oddly satisfying gadgets.

🔥 How It Works
Cup the bottom bulb and your body heat causes the liquid inside to “boil” and rise through the tube. It’s a mesmerizing demonstration of heat conduction and energy transfer — no batteries, no tricks, just real science doing its thing.

Great for:
🎓 Graduation gifts
🧪 Science demos & STEM fun
💘 Valentine’s “love meter” gag gift
🖥️ Office desk fidget or thinking tool
👨👩👧 Parent-child science moments

Two people can even hold opposite ends and see whose heat moves the liquid faster. Friendly science competition? Absolutely.

📏 Specs:
• Approx. 8 x 7 x 2 inches
• 2 oz each
• Glass construction
• Ships in protective safety hard box

⚠️ Important:
Made of glass – handle with care.
If dropped, it can break.
Contains small parts.
Not for children under 3 years (choking hazard).
Keep out of reach of very young children.

A fascinating science toy that never gets old — because real science is cooler than magic.

Comes brand new / factory sealed.