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Amazon.com: NATIONAL GEOGRAPHIC Battery Making Kit - Potato Clock and Penny Powered Flashlight Science Kit, 2 STEM Electricity Projects Great for Girls and Boys, Science Projects That Teach Kids About Circuits :
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Amazon.com: NATIONAL GEOGRAPHIC Battery Making Kit - Potato Clock and Penny Powered Flashlight Science Kit, 2 STEM Electricity Projects Great for Girls and Boys, Science Projects That Teach Kids About Circuits :
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Amazon.com: NATIONAL GEOGRAPHIC Battery Making Kit - Potato Clock and Penny Powered Flashlight Science Kit, 2 STEM Electricity Projects Great for Girls and Boys, Science Projects That Teach Kids About Circuits :
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