JILL SAMELSON will never forget the day that broke her heart. She was watching her 16-month-old son Adam playing with a bubble toy. Something wasn't right. Instead of trying to blow the bubbles, as he had done before, Adam inserted the stick in the bottle over and over in a mechanical way. Looking at him, she felt her heart sink. 'Oh my god, here we go again,' she said to herself.
Samelson felt a sense of foreboding because she had lived through this once before. Two years earlier, in 1997, her first child Elizabeth started to show the same kind of repetitive behaviour. At about the same age doctors diagnosed her as autistic. In the weeks that followed the incident with the bubbles, Samelson watched helplessly as Adam lost most of his social skills, including language.