@dennismcl , sparklefaceprincess, Dennis , I really have no idea what is inside a care bear. You have nothing to loose really, so carefully open the bear up trace the wires to the speaker repair loose or damaged wires and if all connections look OK , try another similar size speaker from a hobby store wired to existing to see if it works, if it works remove old and install new.
Sparkleface, same for you, carefully open the bear up and check all the wires connections all the way to the button back to the voice box, fix any connection/wires that look bad and give it a try.
If need be talking care bears can still be bought new or use, although I truly hope you have luck fixing yours. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.