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.
This advanced physics kit is perfect for older children already versed in physics knowledge!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
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.
Learn about hydrogen fuel cells with this incredible kit!
This is a classic demonstration toy of the powers of magnetic fields!
Build an electromagnet, an electrical catapult, a doorbell chime, a telegraph, and more with this kit!
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