The game looks cute, but it is based on research into the methods that perpetrators use to manipulate children when it comes to grooming. Methods like flattering, nagging, threatening and bribing.

After the game, a discussion follows

Each player has a number of clues that lead to a treasure they hid on the island. While protecting their treasure, they must try to find the other players' treasures. Whoever first finds someone else's treasure wins. During the course of the game, a chat pops up that tries to manipulate the players into leaving their clues.

- When the game is over, a discussion follows with the students about what happened in the game, online strategies for perpetrators, self-esteem, border setting and children's rights linked to grooming, says Joanna Lundquist, chair of Change Attitude.

At present, about 3,000 schools are playing the game, initiated by the Change Attitude Foundation and developed as a researcher at the University of Skövde.

"I hear that students have been affected"

Lotta Kajving works as a school curator in Västerås and is the one who made sure that the schools in Västerås now get the games. The cost for all games is zero.

- The games are really needed and I want the children to be careful online. Think once again extra, she says.

Furthermore, Lotta Kajving believes that it is her job role to inform about "boring things" to protect the children.

- I hear that students are affected by grooming and find it becoming more common, it escalates, she says.