Well, typically children aren’t polygamists, their parents are. (to be a polygamist you must be married) Most polygamists (like 99%) do not live on compounds, and their children participate in regular society. Of course it’s a matter of opinion, but children tend to do better outside of compounds. Its true that living on a compound might prevent your children from being exposed to opposing opinions and ideas, but children need to learn and understand different and opposing ideas in order to function well as adults. Also, knowing about opposing opinions from childhood often solidifies your faith as an adult.