I don't feel that Roo is yet able to understand the idea of autism but he is aware that he is different.
It would be difficult for me to summarize what my approach to balancing this is, but I do have a good example of it.
When we visited his paediatrician last month, she began talking to myself and his dad very quietly, almost inaudibly to us, while he was playing.
When asked why she was doing that, she replied that it was because she didn't want him to think she was talking about him.
My reply was that if he did think she was talking about him, it would be because she was! and asked her to speak to us at normal volume.
He knows he's not visiting her for her benefit, or for his: he knows it's because he's different, but that it's not necessarily a bad thing.
I think that to hear hushed voices may make him think there's something "wrong" with with him and conclude that something is a lot worse than it actually is.
I want to keep a place open for him to be the 4th - actually the 1st! - voice in that discussion, regardless of whenever he is able or willing to take it.
I also think Katie having her own name for it is a good thing.
It's her Aspergers so she can call it what she likes.
I'd never thought of it before but it's certainly something I'd like Roo to do if he wanted to