In each edition of the BIK bulletin, we look at a topical issue – in the latestedition, we look at online challenges from the perspectives of various stakeholders. Geert Reynders, who lost his son Tim to a dangerous online challenge, shares his views on the issue and on how different actors can play their part in ensuring young people remain safe online. His perspective is complemented with that of the European network of Safer Internet Centres, young people, educators, researchers and industry.