Taiwanese student Kai-Xiang Xhong is a cardboard master. He's been slicing up old boxes and building 3D sculptures that are strikingly realistic (well, besides being obviously made of brown cardboard). His Ironman suit is a prime example. Each detail of the fully articulated suit is reproduced faithfully, right down to the glowing chest plate... and of course, it's completely recyclable. Beat that Tony Stark.
Xhong's other creations include a seriously muscular Godzilla statue (that has never skipped leg day), a number of cardboard fossils (like a T-Rex and a flying Pterosaur), and a Bearded Dragon that's so life-like people have mistaken it for a real pet. For the secrets of Xhong's creation process, it's definitely worth a trip over to his Facebook page (Hint: this "Stark" shoots glue guns).