Has anyone had success with martial arts? I want my son to take lessons, but I've always feared that it will backfire. IOW, he'll learn new ways and more effective ways of being aggressive. I'm so sick and tired of him attacking my daughter all the time. She will not hit him back because she doesn't want to hurt her brother. daughter doesn't want martial arts. She's content with her music lessons. I tried music with DS, but it didn't work and his last lesson is next week. He had 5 weeks, and he only behaved in 1 out of those 5. He had a few trial classes at some martial arts schools when he was around 4, but he was too impulsive (um...isn't that an area they work on?!) and no one was willing to take him on.