A new campaign for a child welfare organisation The ANAR (Aid to Children and Adolescents at Risk) Foundation in Spain has created an advertisement that can only be seen by children.

Anyone under four feet, three inches can see bruising on a child’s face in the poster, along with ANAR’s hotline number and copy that reads, ‘If somebody hurts you, phone us and we’ll help you.’

Anyone taller can simply see the child without the bruise and the line. ‘Sometimes child abuse is only visible to the child suffering it.’