Quoting Mumzy...:" I couldn't bear to have my kids not believe at such a young age. It takes the magic out of Christmas. ... [snip!] ... parents make their kids grow up too fast, and I'd like to keep my kids innocence a little longer. But that's just my opinion."
On the other hand (like how it will be in our house) We are saddened by the fact that we believe Christmas should be about Christ, and it's a shame so much emphasis as been placed on an imaginary person. (I know not everyone is religious which is why I said in our house)..just another point of view.