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Green Science - Potato Clock

Be a scientist as you discover how to power this digital clock using potatoes. Experiment to find out what other substances will power the clock - you'll be amazed! Caution: High Voltage Inspiration and Fun! Contains digital Clock with wires, pots, connecting wire, transparent tapes, copper and zinc strips and detailed instructions. No batteries needed to power the clock!

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UK Delivery from £3.95

£12.99
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