I got a question the other day from a high school student, asking if I believed in Santa Claus. My stock answer is yes. To not believe in Santa Claus is tantamount to not believing in Christmas. From the secular view, you can't believe in Christmas without Chris Kringle. Our view point, how the jolly old elf might look changes over the years, but we always believe in him.
More important than believing in Santa Claus, you can't believe in Christmas without believing in Jesus Christ. Forget Santa, Jesus is where Christmas turns magical. You never look at Christmas the same way after you accept Jesus in your life. To think the creator of all things would choose to come to Earth, to be with us, in the form of a baby, is miraculous and filled with wonder.
Believing in the baby is just the start. In order to have eternal life we must believe that little baby went on to die for us, for our sins. It's the only way. Christmas only makes sense if we follow the story to the death and resurrection. I pray you and your family will believe in the whole story of the birth, life, death and resurrection of Jesus!