Build three vessels out of your recycled plastic beverage bottles then power them with the sun using the included 1/2 watt, waterproof solar panel. -- You can build a solar speed boat, an air boat, and a surface submarine. No batteries required. Includes solar panel, solar motor with wires, water propeller, air boat propeller, mounting tape, 5" metal shafts, wire nuts, complete instructions for three designs.

$21.95

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Watts Up Pro Electricity Consumption Meter

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