- 4M GREEN SCIENCE ECO-ENGINEERING WATER POWERED CLOCK
4M Eco Engineering Water Powered Clock. Just add water and Magic. The clock begins to work! Build this Water-Powered clock and learn about how Batteries work. Contains clock frame, water container, clock module rear case, zinc strip, copper strip, wire, electrode holder, screws and detailed instructions. Ages 8+
4M GREEN SCIENCE ECO-ENGINEERING WATER POWERED CLOCK4893156034113
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