Over three days, classrooms and playgrounds were turned into robotics labs, drone-testing grounds and artificial intelligence workshops. Valérie Gauriat joined in.

The gathering is the highlight of yearly activities led by the HK Unicorn Squad. An NGO founded in 2018 by Taavi Kotka, one of the architects of Estonia's digital transformation, and his wife Kerstin.

The organization provides free technology education to girls across the country, aiming to attract more women into science and engineering.

Leading a workshop on robotics, Taavi Kotka watches on, giving occasional advice, as groups of teenagers are focused on building and programming toy-like robots.

"They have to figure it out by themselves, with zero clue, in 30 minutes. It’s solvable, I did it in 40 minutes”, he jokes.