Take a look at this billboard developed by Grey Advertising and Adolescents at Risk Foundation (Spain) to highlight child abuse, with two messages… one that adults see and one that children see. It’s a simple mechanism that we all know well, but a stroke of genius to those that executed it in this particular way (I love clever people).

A lenticular photo allows a different image to be seen by someone who is shorter than four feet, five inches. The ad above, seen from an adult’s eyes portrays a stoic child with the message, “Sometimes, child abuse is only visible to the child suffering it.” However, from a child’s perspective, he sees a bruised image of the child with the message, “If somebody hurts you, phone us and we’ll help you.”