This is Dylan, the 2 year old boy of my brother's stepdaughter. Last night I saw him for the first time since he started walking. In Christmas of 2004, he was an infant. Several of us noticed there was something "funny" about him and remarked on it. Christmas of 2005, he was a little over a year old and didn't interact with anyone, including the other children. He was fascinated with the jingle bells hanging on the front door and spent the entire Christmas Eve last year shaking them, with no interest in anything else. If anyone moved him from the door, he would crawl back to the door as soon as he was let go. Last night was the first I had seen him since he began walking. Several of us noticed his peculiar behavior, although his mother seems oblivious that anything is wrong. He spent all evening very purposefully walking around the house while holding his arms close and shaking his hands. Periodically he would stop at a certain throw rug and very methodically scrunch it up. As soon as that was done he would go walking again. Several of us tried to get his attention but we were not even able to make eye contact with him. It was as though everyone around him was invisible. He showed no interest whatsoever in toys or in unwrapping his gifts. His mother says he is obsessed with watching TV, but he never plays with toys, nor does he play with his sister. In watching him last night, he doesn't seem to know his sister exists. The walking was so strange. Down the hall and back, around the kitchen island, around the couch, and back down the hall. The same route over and over and over while doing that hand shaking. Everytime he came around from the inner side of the kitchen island, he would stop and scrunch that rug. He does not respond to his name, not even when his parents call him. He's not deaf because he will react to a sudden sound. He seems to be completely in his own little world. Any thoughts?