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.
Make the coolest 3D pin art on your desk with this amazing desk toy.
Great tarantula specimen for the science classroom!
Illuminate both your room and your mind with this ingenious Periodic Table Lamp.
Do micro-controller projects and program them using your own computer!
This mirascope creates a 3D hologram image!
See the surface of the moon with this high-quality beginners telescope.