Spanish organization called the Aid to Children and Adolescents at Risk Foundation (ANAR) is launching a special campaign for abused children to reach out for help safely. They’re doing so with an ad that displays a different message for adults and children at the same time.

A message that’s readable by anyone reads “sometimes, child abuse is only visible to the child suffering it.” When a child looks at the ad (thanks to a lenticular lens) they see bruises on the boy’s face and the additional message: “if somebody hurts you, phone us and we’ll help you” alongside the foundation’s phone number.