Never buy another D battery again with this handy AA to D battery converter! Just place two AA batteries plus side down in the plastic casing, and the unit will operate at the same voltage output (1.5V) as one D battery. Great to have around the home, office, or lab. Measures 2.25" x 1.25" x 1.15".
Experience this sphere powered by the sun!
This is a classic demonstration toy of the powers of magnetic fields!
An unconventional ball-tossing, head-catching challenge for 2 players or teams!
This microscope is so versatile you can even take it with you on a job site!
Use this awesome prism to teach about optics and light in the classroom setting!
Build your very own smart robot!