I’m not yet a parent but I imagine at beaches kids can have a tendency to wonder off. Nivea Sun and FCB Brazil have created a print ad that contains a bracelet with
a RFID tag Bluetooth chip* that can be torn off and out around the wrist of your child. The bracelet links to a custom app called NIVEAProtege that alerts you to tell when and where your kid wonders off to when they move a set distance away from you.
Another nice example of a product that’s and ad, and vice versa.
*Thanks Marcio from FCB Brazil for the correction