Actually a lot of space for kids if you are teaching modern wushu. A friend of mine has a CMA school and has a group of kids that he teaches the various form, he also teaches Sanda as well. He (not Chinese) spent several years training in China and is also very good at, and loves, what he does. He is, IMO, a martial artist to the core. He has trained multiple styles, Modern Wushu, Taijiquan, Sanda, BJJ, MMA, JKD, Kyokushin, etc. However I don't believe he is doing this to make anything more effective, he has done it, and does it, because he absolutely loves martial arts. He probably has the biggest CMA school in my area, but still considerably smaller than virtual any TKD school you can find. He loves what he does and is a very positive influence to the kids that train with him. And he does had a standard that he adheres to. It is likely the difficulty of the forms and that standard that keeps his school at the size it is. Also, his school appears to be the one where the Chinese community sends their kids. But with that said he also has a JKD group there, and pre pandemic there was a Japanese group holding classes there as well. And of course, as I mentioned, Sanda, both kids and an adult class