Nobody told me either. I was left to work it out for myself, then Christmas lost its charm.
It's what happens when you reach double figures. Wasn't against getting prezzies and chomping on chicken, though (Grandad's chickens were as big as supermarket turkeys back then, and tasted better), and Christmas pud... nuts... choccy... more nuts and so on. Worked it all off playing rugby at secondary school, nevertheless.
We left our kids to grow up at their own speed. There was a six year difference between the older girl and the younger, and the boy in the middle. They didn't spoil the fun for each other - and the wife's a big kid at Christmas (haven't told her either)!