My son read a book in school and it had a character with autism in it. One day he said to me "Mom, do I have autism?" I asked him what he thought. He said it seemed like maybe he had a "little" autism or something along those lines . I told him he was right, he did not have a diagnosis of autism (he has NVLD and ADHD), but that his brain does work a little bit like an autistic's brain. We then just talked about how sometimes this makes things easier for him and sometimes it makes it harder. It worked out very well for him to bring the issue up first.
I have not told my daughter, who does have a diagnosis of autism. I will tell her when she asks or comments about how she feels different from others. Right now (almost 7) she does not notice she is any different than anyone else, except that she is smarter and a good artist. My son's social issues became glaringly apparent to him during his 7th year, so I imagine her perception will change soon.
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Mom to 2 exceptional atypical kids
Long BAP lineage