Nope...
1. you are teaching your children pagan practices
2. you are directly lying to your children, breaking you shall not lie commandment
3. think about how you are teaching your child that it's ok for Santa to creep on them.
4. you are giving a fictional person credit for your hard work and love for your children
5. show me in the bible where Santa was something Jesus said we should remember him by. I only recall him saying to remember his ransom sacrifice at death.
6. you are teaching your children that it's ok to not work for things and expect that things will just be given to you if you wish it
7. do you also teach your children about Krampus?
...
I could go on and on but you get the picture.