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motor hums but does not rotate
@sueanne1 , Sue, If you are able to disassemble Christmas doll and check that the motor is indeed the problem and not perhaps a stripped gear or possibly out of adjustment. You can then take the motor/gear with you to a good hobby shop and find replacement part perhaps. You could also try a search on the net for replacement part using the make and model of your Doll. If not keen on trying the repair yourself, try a good local small appliance repair shop. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
Contact you to repair these 1950s animated Christmas dolls your ad is kind of difficult