They don’t necessarily care what you think.
You think they should wear clothes that match? That's cool. You think they should join the same activities as the kids in the neighborhood? That's a nice thought. Strong-willed children are going to do it their way (no matter what your opinion is), and you should let them. These children are less likely to be swayed by peer pressure because they are self-motivated and only do things because they believe in them, not just for the sake of doing them.