My DSis told me today that DD(4) was playing hide and seek with her on Christmas Day, and when my DN(3) pulled off the covers and my sister said oh look, DN found you - my DD said 'no, I want to play with a real human'. And when my DSis said that he was a real human, she said 'no, a real human that talks'.
This obviously really upset her, and has really upset me too. DN is non verbal, and has autism. We've spoke before about how kids are quicker at learning at different things, and about how DN is brilliant at running and jumping, same as she is very good at xyz, and wouldn't life be boring if we were all the same etc etc. But she hasn't mentioned it for a while, so I haven't either. I thought she'd just internalised it and didn't question it anymore. Her nursery used to say how good she was at including a boy in her class with autism too 
So my sister has just said to maybe explain that he has autism. Which I'm going to do. But I just wondered if anybody had any experience in how best to go about this - and particularly, any good books that we could read together?
Please no flaming, I'm really upset and want to fix this. She isn't a bad kid, and always tries to interact with him. It's just the dehumanising language that she used that's really upsetting.