This video shows how a public health advertisement reveals a secret message to the audience. Using a lenticular top layer (like a blinky cartoon prize in a Cracker Jack box), it shows two different images depending on the height of the viewer. A tall person sees the child's face and a statement concerning abuse, but when a child looks at the ad, they see bruises on the boy's face and a different message: "if somebody hurts you, phone us and we’ll help you"!