Of course they meet new friends and see new places. But they also need to adjust to a new language and new cultures, all the while learning to obey their new father in difficult circumstances. And taking responsibility for each other even when lost on the streets of Paris.
The Bobtails series is set in Vermont in 1889, and concerns the lives of four children left orphaned by a gas explosion, and adopted by their aunt and brand new uncle. It teaches values of obedience, hard work, and taking responsibility.