Solitude is the capital city of both Haafingar Hold, and all of Skyrim. It works by flagging the kids as adults, which also allows them to work with mods like flower girls. This provides you with unseen features and enables you to deal with your workload in a smarter way. I'm guessing from how the kids were implemented in Skyrim that Bethesda either 1) did NOT want to include children and were forced into it by popular demand, or 2) they just hate kids.
Includes the bodies and all the child outfits with working dismemberment.