FastCompany describes a new ad campaign aimed — quite literally — at abused children:

Alongside the International Day Against Child Abuse, agency Grey Group España launched an outdoor campaign that uses lenticular printing to mask the poster’s message from adults. People over 5 feet 7 inches tall (reportedly the average height of an adult) would see one ad of a sad but otherwise unhurt child with the message “Sometimes child abuse is only visible to the child suffering it.” For those under 4 feet 3 inches (the average height of children under 10), the child’s face appears bloody and bruised, and the text, “If somebody hurts you, phone us and we’ll help you,” becomes visible.