So sings the crooner Andy Williams. And it can be with some careful planning. Here’s a little list of things we have found useful over the years. Introduce decorations, presents, cards, Santa and the story of Christmas slowly through books and social stories. Buy your tree early, go at a quiet time and choose together. Put it outside and discuss where to place it inside. Place a few decorations on each day. Choose lights with different settings. If you need…