What are the options for schools in France that teach French to all ages?
The kind where you go to class and have an option to live with a French family.
Also, options on a week or several weeks.
Also, offer excursions.
There are schools like that in Tours and Aix-en-Provence which are rather well known. Usually, these are for younger people who are studying for several months:
http://www.institutdetouraine.com/
https://www.is-aix.com/french-school-france/
One of the best language schools in France, based upon conversations with numerous friends who have studied here is the Institut de Français in Villefranche-sur-mer. They have week or several week courses for adults: