Saw this on Bungie.net. This kid has made many of the weapons and even a partial suit of Mark VI Mjolinir armour out of cardboard.
Very nerdy, yet very imaginative. Really though, look at the engineering he's done with nothing but cardboard and tape. Clips that load, and even a Rocket Launcher that pops open to change the rockets.
Granted he'll probably get his but whooped at school everyday, but you have to really respect this kids ingenuity.