I have a 9-year old son who is very active. Last year, I enrolled him in Taekwondo for him to have something to do during school break. He pursued the sport until he reached the point that he just wanted to stop. I don't know the reason but whenever I ask him if he wants to go back to training, he tells me that he doesn't want it anymore. This school break I enrolled him in swimming classes and it just ended. I am thinking of other activities that he could go into to keep him busy and active. I don't want to be forcing him. What is the best approach for this?