At what age did your kids stop believing in Santa Clause * assuming you have kids *

My son wasn't fooled easily

I don't have kids...but I myself never stopped believing. I mean yes I know that no such person exists or has ever really existed (excluding St.Nicholas whom he's based on), but I do still believe in Santa's Cause if not "Santa Claus".

Mines in his 20s and still playing along - asking what Santa's gonna be bringing and how'd Santa do in the stock market this year...but I think around 10 he started to suspect...

I don't really remember. My daughter admitted she didn't believe for a couple of years but didn't say anything, just in case.

Around 8 or 9 told be other older kids I think

I found my gifts hidden one day

We never believed in it