skribs
Grandmaster
I did wrestling in middle school (starting Age 11). The kids who had prior experience were better than kids like me who had just started.I'm aware of what TKD schools do. Teaching grappling skills is exponentially more complex than teaching TKD. I would support a kid doing TKD at age 6, potentially.
Kids can have a lot of fun doing a lot of things, but if we are talking about actually developing skill, technique and learning a martial art, 6 and potentially 9 is too young in my opinion. This is a common opinion shared by many people who actually teach submission grappling arts.
Of course there are always instructors who are focused on the money and will develop a program to "entertain kids" so they are having fun. But this has little to do with learning a martial art.
People say the same about TKD, that you shouldn't bother putting kids in TKD because their punches don't actually have power, and they don't actually learn correct fundamentals until they're older anyway. It's all a bunch of hooey.
Kids can start learning any skill at a young age. They learn it different than adults. They might not be as meticulous, but they also benefit from the fact their brains are sponges for information. And a 20-year-old who has been doing BJJ for 15 years will have a much different level of skill than a 20-year-old who's been doing BJJ for 2 years. Even though they might have learned more in those 2 years, they're still quite far behind.