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".
Learn all about Newton’s Laws and Energy conservation.
Discover how solar cells make electricity with this awesome kit!
Shake the Pet Tornado clockwise and watch the mini tornado funnel form before your eyes!
Create all kinds of marble run combinations with this 80-piece Marble Run set!
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
The large realistic model has removable organs that can be studied and set back into the correct position.