I also think that it's not considered lying. As a matter of fact, being a Christian myself, I plan on eventually just telling my kids that their dad and I are really the true Santa and tooth fairy, and explaining where the whole "saint nick" story originated. I don't remember being told when there was no Santa, but what I do remember is how excited I used to be on Christmas Eve, and how I would try and try to stay awake, and how much fun it was to write Santa my Christmas list, and how much I loved going out the night before and putting reindeer food in our yard. I think that because of those precious memories, that by letting my children believe in their own little fairy tale of santa and the tooth fairy, I'm allowing them to truly enjoy being a kid. so, it's totally up to you, but I will tell you one thing, my brother had step kids during his last marriage, and they decided the same thing, that they weren't going to let their kids believe in Santa, wouldn't even let anything that had to do with Santa in their house. And, therefore, they were the ONLY kids out of all the grandkids that didn't have the total ecstatic excitement the night before. I thought it was sad, and although I saw his point, I think that it was taking it too far with the lying thing. It's not lying, it's about feeding their imagination. Having said all that, I'm not saying that you're wrong, because I do understand your logic, but they're kids. Can you imagine not being allowed to ever believe in these magical things as a child? Those Christmas memories wouldn't be the same, would they?