Set of 4 single AA battery holders that snap together to form either parallel or series connection.
By using these 4 battery holders you can get 1.5V, 3V, 4.5V or 6V (series connection) or get 4x current at 1.5V (parallel connection).
Great, versatile AA battery holders for any electricity project.
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
Comprehensive collection of 30 fossils.
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
Get swept away by this fantastic robot kit that uses vibrations to move!
This illuminated orbiter is great for demonstrations in the astronomy classroom!
Great tarantula specimen for the science classroom!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.