Childrens have a lot of imaginations specially during Christmas holidays. One of this is Santa giving some gifts to them and it enters in the chimneys bringing the gifts. This kind of belief helps to make our children doing good. We always talked to them that if they do bad things, Santa wont give them a gifts. So it will developed in their mind about doing good things so that Santa will be pleased and happy, and also giving them some gifts.
As for this, children will wait for santa to come not knowing that the santa claus they were waiting is Us as their Parents. Giving and do a good deeds is not only for Christmas and it should be done everyday.