PT and After School Activities

So my little guy is trying his hardest to find an extra-curricular activity that he will enjoy.  Yesterday we tested out karate, in the car he said to me, mom I am not sure that karate is for me, I didn't really have too much fun.  So onto the next thing, in search of swimming lessons that do not break the bang because as he put it, "I think swimming is my thing mom." Okay if you say so,  he was so cute in karate and he did really well for his first try, do I make him do it anyway or just keep trying to find something that fits him.  Hmmm.  Little Miss is doing really well at her PT, getting stronger everyday.