It's the French state's own cultural institute, so classes come with specialist native teachers, an official Institut français certificate at the end, and a year of access to the on-site media library. Parents can even take an A1 course on Saturday mornings while their child is in class.
The French government's own cultural institute runs weekly after-school French courses for children aged 4 to 10: playful Koalas groups for ages 4-6, general French levels A1-A2 for ages 6-10, and a separate track for children from French-speaking families. Teenagers have their own courses at the same institute.