[STEM TOY KIT] Electro Magnetic Swing E-61A Light-bulbs Turn your crafts into eggs-travagant

Turn your crafts into eggs-travagant works of art with 12x12-inch

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[STEM TOY KIT] Electro Magnetic Swing E-61A Light-bulbs Turn your crafts into eggs-travagantWithout using any electronic components, just using the electromagnetic phenomenon can make the small swing continue to move. This is the famous electromagnetic swing. As long as the battery is installed and the switch is turned on, it will swing continuously. Why does it keep swinging? Where does it power come from? Let us explore the mysteries together!