I guess I don't understand. I have never worried about my kids "fitting in." I always figured they would find their way, sooner or later, to peers, and they have. When my son was 6, he was obsesed with the presidents, he knew every one, their birthdates/death dates, their term dates, their vice presidents, vice presidents birth/death dates. All of them. He went to a NAEYC 1st grade class, and had no issues expressing his passions. One student in his class was developmentally delayed, they became good friends. I just don't get worrying about other people's reactions. It is a part of life. Would you worry about your child of they were developmental delayed, appearing to be delayed?