I was awarded a Black Belt at 10 after training for 7 years. As someone else mentioned, the only difference in requirements was breaking (smaller boards, not different techniques) I had trained at least three times per week for my 7 years time as well as ranked nationally amongst other children my age as young as 5 years old. We obviously had to know our physical skills as well as good attitude, written reports including the history of the art as well as a more personal one and many korean terms covering body parts, counting, stances, kicks, punches, etc. There were not many young black belts in my school. I was definitely a rarity, and to this day, he still does not award a young martial artist this rank without the proper requirements deemed for his school. After 1st degree, I chose not to test again until about 15 years old for 2nd and another 4 years for 3rd. Though becoming a BB at a young age myself, I think it takes a special child to earn a black belt and I definitely agree that they are being 'given' away far to often without consideration of not only physical ability, but also mental ability. I'm currently struggling with an instructor at a different school than talked of earlier, that is pushing a 15 year old to test for his 5th degree... different story, different rant... different time...