@evan Qualified no. I think most open federation / blocklist servers cannot be locked down adequately to protect (inexperienced) users from seeing horrifying things, receiving harassment, and other age-inappropriate stuff. So if I interpret this as inviting your children to your existing server, I think this is generally a bad idea.
I think that island networks / allowlist servers have potential for easing children onto the Fediverse, which is one reason I'd like one for my friends and family.