My son  really enjoys a good martial arts film. While some of it looks a little extreme, I think he is fascinated with  the accessories which he says are awesome. I once took Karate lessons for about two months...it was fun, but not really my thing.  Both my boys took it when they were young and really seemed to like it.. My one son is in his thirties and he is still fascinated with Swords that you see in those movies sometimes.  I decided to surprise him and I bought him a domain, now I'm interested to see what he puts on it.