I made a separate head for the first one I built.  I wish I had a picture!  It's packed away at church right now, and I don't have a pic.  I will try to get one this Wednesday. But I used a sort of oval shaped head and made the neck with black fabric.  It took two people to operate it, one worked the head, one worked the body.  It takes two people who don't mind being really close. LOL
But I have seen some that don't have a working mouth, so no need for two puppeteers. I'm trying to figure out now, how to actually work the new ones I'm making.  The person who worked the head had a hard time keeping the head looking forward, they had to drape their arm over the other person's shoulder so the head tended to look down, or crooked a lot.  I don't know if having the person who is wearing the body work the head and one arm while someone else works the other arm would be easier or not.  We are going to experiment.  Anyone have any experience or advice on this?