🔬 Classic Thermodynamics Science Toy – Heat to Motion Magic! 🚀
Get ready to amaze kids, adults, teachers, and even your cat (probably 🐈) with this mesmerizing retro science gadget! Known by some as the perpetual motion head dunk, this glass marvel uses the fascinating principles of thermodynamics to transform heat energy into motion — no batteries, no charging, just pure science and a splash of water magic. 💧✨
How it works: Simply moisten its head, place it next to a glass of water (not included), and watch as it leans forward, takes a “sip,” tips back, and does it all over again… for hours! Does it work better with hot or cold water? That’s the fun part — you get to experiment and find out! Perfect for STEM learning, science fairs, classroom demonstrations, home desks, or just as a quirky conversation starter.
Why it’s awesome:
✅ Fun & educational – See real physics in action!
✅ Powered by evaporation (aka the wizardry of science)
✅ Great for kids to adults
✅ Retro design in bright assorted colors
Details:
Material: Closed glass with vibrant red magic solution
Size: approx. 7⅜" tall with stand
Water glass not included
📦 Comes brand new in retail box 🎁
💡 Fun Fact: This scientific wonder has been blowing minds since the 1960s! Whether you’re gifting it to a curious kid, adding it to a science classroom, or just want the most unique desk toy ever, it’s guaranteed to spark curiosity, conversation, and a few laughs.
U.S. shipping is FREE on 99% of our eBay listings unless otherwise stated.
Additionally, we offer affordable international shipping options. We take pride in minimizing postage costs for our customers, so we cover a portion of the cost on our end to keep cost low.
Please note: While we strive to dispatch orders within 24 hours, we cannot guarantee exact transit times due to factors beyond our control. eBay provides estimates, which may vary depending on the carriers. If you require faster delivery, we recommend upgrading to expedited shipping services.
Please contact us via eBay message within 30 days of receiving your order. We'll be happy to assist you with a replacement or refund. We kindly ask that you ensure the item is returned in the same condition as it was supplied. Once we receive the returned item, it will be inspected, and a replacement or refund will be issued accordingly.
We understand that returns can be inconvenient for both parties, and we strive to provide accurate descriptions and images of our products to minimize the need for returns. We encourage our customers to carefully consider their purchases before placing an order. If you have any further questions or concerns, please don't hesitate to contact us. We're here to help. Thank you.
Welcome to Save A Buck Enterprises—where laughter and unbeatable bargains are always on offer! Whether you're in the mood for a giggle, a chuckle, or a full-blown belly laugh, you've stumbled upon the ultimate shopping haven! Since 2000, we've proudly operated as a small, family-owned business with the helping paw of our trusty 5-pound Cavapoo dog named Barley.
Your orders will fly out the door faster than a squirrel on a caffeine high chasing an acorn! Ready to explore our treasure trove of quirky delights? From symphonic fart machines to pranks fit for the spotlight, our selection will have you questioning reality itself! And our prices? They're as low as a limbo bar at a hobbit's birthday bash! We're dedicated to keeping your wallet happy and your day filled with laughter—guaranteed!
