Striking arts, whether they be Karate, Tae Kwon Do, Boxing, Kickboxing, etc. - all require high degrees of focus on multiple facets of fighting, & self-defense (you can read more on this in my 2015 blog post).
I have spent the past 18 years practicing Mantis Boxing, and the past 5 of those also practicing Brazilian Jiu Jitsu. I also spent years teaching kids both Kung Fu, and Brazilian Jiu Jitsu. My first love will always be Mantis Boxing, but frankly speaking, it is not for kids.