Parenting
You probably will notice with Jenny and Matti and then as other youngsters join the story that there are distinct parenting styles and choices. Kev and Fin the Tailor boys are pretty free to do as they like within a framework. They are considerably older than Jenny and Matti, but they are also not supervised by dragons as well as humans until they are older. As time goes on, you can see the differences as to how they are supervised.