Miniature outdoor ads are just so damn cute! Once upon a time we had the tiny billboards  for the PlayStation game LittleBigPlanet. More recently we saw the 12-inch-high signs,  made of Legos, advertising the Legoland Windsor resort in England. Now, here's a similar effort from Canada (and ad agency Rethink) promoting the mobile edition of the Metro newspaper. Inside the tiny newsboxes are QR codes (which are making a comeback, remember?) that connect readers to Metro's mobile edition. Now, these ads are pretty small, but they're hardly record setting in that regard. Last year, you'll recall, Gillette etched the world's smallest ads on man's shaven whiskers. More images after the jump. Via Breaking Copy.