Last Christmas, my aunt gave me a USB Christmas tree. It’s one of those fiber optic pieces that alternates color. My mother reminded me about it earlier in the month, so I connected it to my desk top. I rarely use the desk top these days. Occupying one USB port wasn’t going to kill me. Besides, that little tree is awesome. I was sure Shaun would love it when he came to visit. And, on the first night I had him here, I showed him and he fell in love with it. We sat in the TV room/study and played on the floor with his toys. Every so often, he got up and stood in front of the desk and stared in awe at…