This is a standard DC power jack that can be mounted on a chassis for your next hobby electronics project. Measures 2.1mm.
An unconventional ball-tossing, head-catching challenge for 2 players or teams!
Use this laser pointer for any professional presentation!
This advanced physics kit is perfect for older children already versed in physics knowledge!
Learn all about the science of light, optics and visual perception with this wonderful kit!
High-quality green laser pointer projects a green dot up to an incredible 2 miles away.
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.