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Battery Science This cool book provides (almost) everything you need to build 8 very hip electrical gadgets. I like the fact that unlike a lot of similar kits, the list for things that you have to provide is very short. My personal favorite in this one: the "Amazing Submersible", in which you transform a liter sized pop bottle into a motorized submarine. Good stuff. List Price:$19.95 Pow!Price: $17.95
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