72 Schools played the ‘Roofs in the Sun’ game in Croatia.

Using Google maps, players mark roofs, and the game shows their solar potential.

Winning school gets a prize: solar kiosk, a mobile solar system.

Photos are from the ceremony and solar concert for the winning school - Elementary School Jože Šurana from Višnjan, Istria region in Croatia. A performance is given by beatboxer Surka.