I got visit from saint nicolas. And i knew the truth at about 8. We did not have a coca cola commercial to celebrate 25/12. So for that one i do not have a age .
Atm Some kids here know it in 1st year off school ( not kindergarden ) so about 6/7. They talk so when the next year is there : about 90 % knows it. And the year after that it is not more expected to have believers in the klas.
We all fo…breeded with them to our kind