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Two-Potato Clock
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Insert the zinc and copper bimetallic probes of this electric clock into potatoes (or apples, cucumbers-even salt water or soda pop) and watch as the digital readout comes alive. Hours, minutes, seconds and date are resettable on the clocks red plastic base. Place it on the corner of your desk as a real student stopper. Size: 21cm x 8.5cm x 7cm high.

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