Roger went to a Boy Scouts of America training last weekend for rock climbing. One of the thing he is working on is better skill at tying certain knots. I think he knew the knots since he has been rock climbing many times but he's trying to get faster and have them more fixed in his brain. Anyway he found this way cool web site that shows an animated knot being tied. I even think it's cool and A. is over the moon. He had already started tying knots for fun and had checked out a library book about knots and how to tie them.