It takes a village. It really does. And Dublin is not a village in this collection. It's a tough place to raise a kid: if they aren't mistreated by their families, and sometimes outright abused, they are lovesick, ashamed, troubled or controlled by their parents. Sometimes the focus is on the kids themselves, especially in the first stories of Dubliners, and sometimes it's on the parents. Either way, there's dysfunction in Dublin.
After the first three stories, which have children as narrators, very few children speak in the rest of Dubliners, even as minor characters. While the early stories demonstrate the effects of dysfunctional family life by their speaking, the nearly silent children in the remainder of the stories play no less important a role by demonstrating their vulnerability.
The only child who plays a role in the longest story of Dubliners, "The Dead," is actually a dead child. Michael Furey gives the collection's stories of children a haunting end.