My 7 year old son studies Tae Kwon Do (Blue Belt)but he also studies Gracie Brazilian Jiu Jitsu (Grey Belt). As part of his Tae Kwon Do program, he participates in traditional Japanese Jiu Jitsu in which they issue belts...he is a white belt because he hasn't bothered to test for any belts as it is only a part time thing. During his Tae Kwon Do tournaments, he participates in sports Jiu Jitsu where all the competitors wear their Jiu Jitsu belts. My (his) question is which belt should (can) he wear? Can he wear his Brazilian Jiu Jitsu belt or should he wear his Japanese Jiu Jitsu belt? My advice to him was to wear what ever belt he wants since he has earned all of them. I lean towards his BJJ belt since it's what he is most proud of AND it is the art which he uses the most when he competes in that particular event. Which belt SHOULD he wear if any?