I live in the south of France and both my kids cycle with me on the roads at least once a week; they are 10 and 12 years old but have both been doing it for a couple of years already. You find that the French give room to cyclist, as it is there national sport. The problem is the foreign cars, Brits, Belgians and Swiss that aren’t too good.
Sticking to the quieter country roads though is no problem, who wants to ride on busy main roads when there is so much scenery to see elsewhere. Pick your times too, as long as you avoid the times when people are going to and from work you should be fine.