I believe that the best leisure activities  for teenagers is playing badminton. Firstly, when they play badminton, it will be able  to keep fit. Besides, it help teenagers develop  height in their growing age. Secondly, it helps teenagers relaxing whenever they feel stress. In addition, this hobby can be very important for teenagers. Finally, playing badminton gives them a lot of fun and health. For these reasons, I think playing badminton is the best for teenagers.