Cool Gadget Alert! Build your own Ringing Bell Lab with this super tricked-out kit from Small World Toys. Now young engineers can create an electric circuit and activate the bell to hear it ring on demand and freak out your little siblings. Contains one cardboard panel, one plastic frame, one plastic base, one bell, one hammer, one metal bracket, battery case with contacts, sprig terminals, adjusting screw, adjusting screw spring, adjusting screw lug, spool, iron rod, washer, screws nuts and detailed step-by-step instructions.

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