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Whenever you have to make a "YES/NO," or a "Heads/Tails" decision, make your life simple and buy KELVIN®'s Electronic Decision Maker. The Kit includes all parts. Requires a 9V battery. Teacher Demo Unit, Assembled/Tested.
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All prices are in USD. Registered Trademarks of KELVIN L.P include, but are not limited to: KELVIN®, Hands-On Science®, Build A Better Mousetrap Racer®, Rat Racer®, And the Winner Is…®, New Standards®, and SUMO Car Wrestler®.|