Great for checking levels of 3.7V Lithium cells. This is essentially a visual/graphical voltmeter, and allows you to keep tabs on energy usage, and to keep an accurate schedule for when to replace your lithium batteries.
Build 14 assorted solar robots, some of which can travel over water!
The Star-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, writers, students, and you!
An ancient toy featuring optical illusion and hands-on fun that never grows old!
Infiniview comes with a 3.5" LCD screen and rechargeable Lithium Ion battery that will last up to 2 hours in the field.
Discover how solar cells make electricity with this awesome kit!
The Hoberman Sphere expands and contracts with a magical motion so fluid and simple that kids can't help but play with it for hours.
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.