FI; DS understands things, such as Change your bum!!! If i ask him this he starts crawling frantically away from me. When we get to his bedroom door he starts a tanty, cos he knows he is getting his nappy changed. Then he will try to turn on the bedroom light, and grab a nappy out of the stacker. He will copy things like clapping, but he doesnt ever point at anything, or follow me at looking in the same direction that I do, which i have heard can be a sign of autism? I guess that is my biggest fear of all.