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Amazon.com: 4M Kidzlabs Metal Detector Robot Kit –Stem Toys Rc Science Project Educational Gift for Kids, Brown/A, Model:4607 : Toys & Games
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Make your own DIY metal detector - turn transistors and other electronic parts into a metal detector - YouTube
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Amazon.com: 4M Kidzlabs Metal Detector Robot Kit –Stem Toys Rc Science Project Educational Gift for Kids, Brown/A, Model:4607 : Toys & Games
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Amazon.com: ALAMSCN Electronic Practice Kit DC 3V-5V Metal Detector DIY Kit Sensor Module Assemble with Buzzer Battery Holder for Arduino Beginners : Electronics
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