Our reply is "if you don't believe, you don't receive". At our house Santa only brings one gift (but it's usually a big one) and Mom and Dad do the rest, so no one wants to miss out on the Santa gift, so we all believe. In all honesty though, my 8 years olds asked a lot of questions this year. My older two have really tried to keep i alive for them by telling tales of seeing Santa drop off gifts when they were younger. I'm glad they have believed this long - our second oldest (now 16) told his class when he was four that it was impossible and all the reasons why.