Spanish child-advocacy organization ANAR Foundation teamed with the Grey Spain ad agency to create this innovative poster, “Only For Children.”

By using lenticular printing, the agency was able to design an ad that looks different to children and adults. As reported by AdWeek, anyone over 4’3″ sees an awareness message with the text, “Sometimes child abuse is only visible to the child suffering it.” However, anyone under that height sees a child with a bruised face, accompanied by ANAR’s hotline and the text, “If somebody hurts you, phone us and we’ll help you.”

Considering children who may be abuse victims are most likely accompanied by their aggressors, this ad provides a way for these children to see a secret message for their eyes only, aimed at providing help for their situation.