Ever since the beginning of the story told, Santa Claus has given hope and belief to children. It has done this in many ways, but the main way everyone sees it is in the smiles the children have on their faces. Every year on Christmas Eve the children and their parents set out cookies and milk for Ol' Saint Nick. When morning comes they wake to see that the milk and cookies are gone and that there are presents under the tree. This puts a big smile on the kids faces and belief in their hearts that there really is someone that is watching good little boys and girls.
The second of the main reasons is because of inspiration. When parents tell their children the story of Santa watching them the children are in awe, but they are also shocked and scared. Knowing that there is someone that may or may not bring them gifts makes them inspired to become better. Every year kids try to be better at being good so they can receive gifts for Christmas. Along with that, the inspiration lasts for a life time with them. Knowing that there is a Santa as a child makes them tell the story as parents to their children to inspire them to be good.