In 1882, Dr. Clement Clarke Moore wrote a poem for his children that described Santa Claus with the round belly and the red suit we know today. He also wrote about his eight reindeer. The ninth reindeer, Rudolph the Red nosed Reindeer, was created in 1939 by the Montgomery Ward Department Stores.
When I have children, I plan on sharing the story of Santa Claus with them. In telling the story to our children we should focus on St. Nicholas giving to people in need as Jesus asked us to do.
And the King will answer them, 'Truly, I say to you, as you did it to one of the least of these my brothers, you did it to me.' ~ Matthew 25:40 (ESV)