Doorbell Making Kit



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Product Description

Learn about electromagnetism and transform a metal screw into a magnetic hammer. Complete an electric circuit with it to construct this handy doorbell. Use it in your room as a cool science gadget. Contents base board, bell, coil cover, L-shaped cover, battery cover, hammer, coil, adjuster holder, hammer holder, washer screw, screws, adjuster, wire with metal ring, long screw and nut, terminal caps and detailed instructions.


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