The Salt Water 4x4 Engine Car Kit teaches lessons in engineering and eco-friendly power. The finished engine is visible - see it working as it moves your mighty 4x4 forward, it’s adjustable height and twist body action allowing it to overcome the treacherous terrain that is the kitchen floor.
Salt water cells create power using oxygen and a magnesium strip. Just place four or five drops of salt water in cell to start the safe reaction.
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