Mood rings were invented in 1967 by a man named Marvin Wernick, who saw a great idea for a toy when he saw one of his friends take a child's temperature by using a strip of thermotropic material. A mood ring is essentially a liquid thermometer that changes color according to the temperature on the wearer's skin. It is thought that this may indicate the mood of the wearer, as some claim that body heat fluctuates with the emotional state of the wearer. This is no ordinary mood ring, however--it features a cool flame effect when changing colors. Highly recommended when trying to find out what your loved one is really feeling--or if you need a small but neat stocking stuffer, gag gift or novelty toy!
Note: Ring comes in a variety of sizes. Although we do try and accommodate requests for specific sizes,we cannot guarantee which size will be sent to customer.
Warning: Choking hazard due to small parts. Not for children under 3 years old.
This set includes two (2) N95 NIOSH approved respirators.
Durable, anti-fog safety glasses that fit comfortably on any head size.
Extra-small nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
Recommended for protection against chemical splashes. A must have for every young chemist!
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
Great reference card for chemistry and physics students.
The Star-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, writers, students, and you!
Build a model green house and 9 other green energy-related devices with this great kit!
This magic bird defies gravity before your very eyes!
This caffeine molecule mug makes an excellent gift!
Build your own windmill generator kit by recycling a plastic bottle!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.