Dancing and Taekwondo are totally different things! First of all, we must respect children's hobbies and interests! I think this is the most critical! After that, I think it's better for girls to learn dance! Because what girls lack most now is temperament, but dancing can cultivate temperament very much! But at the age of 13, it is too late to learn ballet and other dances! I suggest learning Latin! Because the age and basic requirements are not so high! /kloc-started learning Latin at the age of 0/6! It can still be very easy to get started!
As for Taekwondo, girls also have the advantage of self-defense, but to be honest, 13 girls should not learn it, because if you practice it seriously, 13 girls will definitely not be able to stand it!