Smartphones, video games, online homework: screens are everywhere in teenagers' lives. Faced with the risks of addiction and the effects on mental and physical health, some French parents and teachers are pushing back. 

Just outside the French capital sprawls the world's largest antiques destination: the Paris Saint-Ouen Flea Market. It's a timeless escape, and one of the most visited sites in France. We take you on a tour in this edition of France in Focus.