This free three-day festival of science and new technology is both fun and educational. It aims to make science more accessible and to allow young people to try out stuff often left to those seen as star pupils. Last year’s edition attracted 20,000 visitors. There will be more than 200 activities, from building a drone or a missile to programming a robot, to a look at cosmetics or inside the human body. Friday is for school pupils, Saturday and Sunday for the general public.