Keep in mind his "normal" might be dumbing down to fit in with his current peers. DS at preschool paints all over the page (basically a big mess) and at home will paint/draw intricate and detailed pictures of stealth fighters, people with internal anatomy, animals and houses etc. He will flip though picture books at pre-school and read long chapter books at home. He doesn't ask incessant questions in class(but did give himself away excitedly telling the class about the transit of venus when half of them didn't even know what a planet was!). He seems normal to us as he is our only child so he is our "normal". Only when we compare him with our neighbour who is a few weeks younger we realise how not "normal" he really is.
