Karate Sticks How Do I Convince My Parents To Let Me Do Karate?

How do i convince my parents to let me do karate? - karate sticks

I really really really want to karate-do, but my parents say it's expensive and I change my mind too much if you do not want to pay for something I will continue to do. They are also very reluctant to let me do karate, because I'm in a bad mood. I think that karate would teach me self-discipline though.does suggestions convince someone like her?