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.
The large realistic model has removable organs that can be studied and set back into the correct position.
This superb chemistry set features 350 mind-boggling experiments!
Build your very own smart robot!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
Build your own 10 inch kaleidoscope with this great kit!
Build a model green house and 9 other green energy-related devices with this great kit!