It depends on the person's ability to follow directions. I know a few adults that tend to be quite stubborn when it comes to following directions than young kids.:tinysmile_twink_t2:I rappelled once when I was 10 years old. I figure that was old enough since I could follow directions without randomly doing crazy stuff. Do you think 10 years old is the minimum age to rappel? If not, with what age would you be comfortable?