Traditionally the dolls don't have faces, (I was kind of dissappointed to see that, I'd been planning on giving them pumpkin seed eyes at least!). I found an Iroquois legend describing why:
There were once three sisters called the sustainers of life, Corn Spirit, Bean Spirit and Squash Spirit. Corn Spirit asked the Creator what else she could do for her people and the creator said that a beautiful doll could be formed from her husks. The Creator formed a doll for her and gave it a beautiful face. It was then sent to the Iroqois people to make them happy.
The doll went from village to village. She played and brought great happiness to children but, everywhere she went everyone went on at great length about how beautiful she was. She soon grew terribly vain. The Creator told her that vanity was not becoming and she said she would stop so that he would not punish her.
One afternoon, when walking by a creek, she caught her reflection in the water. She couldn't help but think about how beautiful she was. The Creator then sent a screech owl to snatch her reflection. When she looked again it was gone.
So now, when cornhusk dolls are made, they are made without faces.
In traditional cultures in Europe it was believed that the corn spirit lived in the crop and that it became homeless at harvest time. Corn 'dolly's', hollow shapes made from the last sheaf of wheat, corn or like crops, allowed the spirit to spend the winter in the home of the maker. The corn dolly was then plowed into the first furrow of the new season.
More links to info about corn husk dolls: