A junior is a "Disney Adult". Once children turn 10, they pay adult prices. So legally they're still children but at Disney, they don't qualify for children's' prices. Like pp said, everyone on your reservation would get free dining. They say based on 2 adults, etc. but it can be for however many legally fit in one room. The park ticket is a 2-day minimum. Children on the Dining Plan can only order from the children's menus.