Kids and fishing
Glad that you spend quality time with your son. Attention span is short, especialy if action is slow. Show them the world around the stream. Lots of things to see and do. A ride through Cade's Cove is great, allowing them to see real animals like the deer, bear, turkeys, etc.
Today, my wife and I took two of our grandsons to a small pond loaded with bluegill. The bread was too hard to keep on the hook so I tied some old, cheapo flies on their line. They caught a bunch, so many we didn't count them. And.....they are ready to go back.