Re: How old is to old for Santa Clause?
My daughter found out there was no Santa from a kid at school, I forget at what age(she wasn't real young). She came to us to verify what she heard. We had to tell her it was true. Then she asked, "I suppose there's no tooth fairy either?". When we told her, she said "What!!!". She was crushed. No Santa or tooth fairy all in the same day!
Eerily familiar....
My older daughter, then a 6 YO, got the triple-whammy all in one shot.

She came home from school asking her Mum about Santa because a couple of kids at school were saying that Santa was not real ...etc. etc.

Mum figured that honesty was the best policy (but has regretted it ever since) and explained.
Unfortunately the little wheels started turning and... “Mum, so what about the Easter Bunny?”....and then “Mum what about the Tooth Fairy?”....oh oh, Zero-for three! :facepalm:
When I got home from work the poor little thing was a wreck....and no better the next morning.
I didn’t want her going to school in that state so took the morning off work, made some popcorn, and the two of us watched my tape of Miracle on 34th Street....the original B&W version.
The red eyes were quuickly replaced by an ear to ear grin, and when the movie ended, she gave me a big hug and said “I get it Dad. Santa is inside all of us. That was the best movie I’ve ever seen.”
I dropped her at school on my way back to work and she was fine.
Since then, it is not Christmas until the two of us sit down and watch it. That never gets old even 15 years on.
(
note to OP....that movie is available on DVD now....

)