Hit the front end of the Peugot on the opening page, and an actual airbag inflates on the spread inside. Ad agency Loducca made 50,000 of these things for a Brazilian magazine.

QR codes got dictators talking in a recent print ads from the free-press advocacy group Reporters Without Borders. You scan the QR code with your iPhone, then place the phone over the leader's mouth. The mouth starts talking—but it's the voice of a journalist discussing media censorship in that country.

This print ad promoted green energy by being solar-powered itself. In the magazine, it's just a black-and-white sketch. But held up to sunlight, it blossoms into full color.

Follow the instructions on this ad, and you can use the flimsy piece of paper to open a bottle of Carlsberg. Useful!

Volkswagen cooked up a lovely little ad you can eat, and placed it in Auto Trader magazine. The ingredients are listed on the side as "glutinous rice flour, water, salt, propylene glycol, FD&C colour, glycerine." OK, kind of gross.

This Wonderbra ad lets you do a little imprompu boob cinching—a nice little pick-me-up when you're in the middle of a boring article.

Simple and fun.

This Norwegian ad for Volkswagen showed a long stretch of road (in summer and winter versions) and told readers to download an app that lets you "drive" a car on the road by hovering your iPhone over it. You could test three different features of the vehicle—lane assist, adaptive lights and cruise control.

Just what you need—a suntan-lotion ad that comes with a handy way to completely cook your face off.

A fertility clinic in Australia placed an ad in FHM that caused the magazine's pages to stick together. When unstuck, the pages revealed a woman posing in lingerie, along with the line, "Don't waste your sperm." The message being—donate it at the Repromed fertility clinic instead.