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 kit will get your paper plane ready for takeoff!
See the constellations visible in the Northern Hemisphere on this watch!
Over 300 electronics projects in this kit will keep the young scientist busy!
An ancient toy featuring optical illusion and hands-on fun that never grows old!
Learn all about the science of light, optics and visual perception with this wonderful kit!
Easily assemble a working alarm motion detector!