The most unique and non-polluting sources of energy can be found on earth - Potatoes, salt water and mud. You will be amazed at how a spotlight or the buzzer sound comes on. Includes experiment guide to make a coin battery, fork, Potato Buzz play wire and much more. Caution: high voltage inspiration. Contains 3 3 zinc copper plates, plates, connecting cables, 3 plastic cups, wire, wire from a light tower, an LED lamp connection with a sound chip with connection, an experiment record sheet, masking tape and detailed instructions. 8 years +.
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