A bratty cousin told me in 2nd grade. I didn’t believe her. I figured it out by 4th or 5th grade.
All of my kids figured it out on their own for the most part. Except with the first, my husband insisted I tell her when she was 9 (4th grade). After that, swore I would never tell the others, they’d figure it out on their own and ask me. The other 3 figured it out by the time they were in 5th grade or right afterwards.
I figured last year would be the last for Santa in our house, as the youngest was starting to question. Learned a couple months ago that she didn’t believe so no Santa this year :(
I was the brat to my 6 y.o. sister -— for the instant I was proudly dis-abusing her of an illusion, I thought......but then her misery and tears made me feel ashamed of myself.