Green Science Potato Clock

Green Science Potato Clock

47231

Regular price $19.50
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P3275 POTATO CLOCK Use your experimental skills to find out which substances will power a digital clock. Includes 1 digital clock w/ wires, 2 pots, connecting wire, transparent tape, copper & zinc strips & detailed instructions. Clock size: 2.5" x 1.25". Ages 8 years +.