Advertising that displays different messages to children and adults

What's most interesting isn't the technology (which is more than 300 years old) but the fact that this application is first being used for humanitarian, rather than commercial, purposes. I'm a little less jaded now than I was yesterday.

This Ad Has a Secret Anti-Abuse Message That Only Kids Can See

In an effort to provide abused children with a safe way to reach out for help, a Spanish organization called the Aid to Children and Adolescents at Risk Foundation, or ANAR for short, created an ad that displays a different message for adults and children at the same time.