On Mumsnet, there seems to be a large contingent of posters who claim that children over the age of 5 don't believe in Santa and if they do believe then they shouldn't. I have never met a 5 year old who didn't wholeheartedly believe in Santa, elves, everything. I think peak believing years are actually age 4 to 8. It's actually sad because if a child doesn't believe in Santa at 5 then they never really have. I wasn't a particularly naive child but I was 10 when I worked it out. My ds was around 9 I think. To me believing up to age 10 or so is entirely the norm -vor am in the minority in thinking that ?