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".
The Wimshurst Machine is a high quality static machine for student labs.
Get one of the craziest and coolest kaleidoscopes around!
The Star-Ball Magnetic Puzzle is the perfect creativity tool for innovators, artists, writers, students, and you!
Is it a demonstration of a scientific law or a work of art?
Check out this high-quality gyroscope!
The Ball of Whacks is the perfect creativity tool for innovators, artists, engineers, writers, students, and you!
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