This Instructable will show you how to make Thor's Hammer out of cardboard.
Step 1: The Making
I simply made a box out of cardboard, then used a cardboard paper towel roll as the handle, which also goes all the way through the hammer, for support. I then filled the hammer with cardboard scraps to make it slightly heavier. Use whatever you want to fill the hammer, but make sure it's something that a paper towel roll can handle.
Step 2: Finished Product
The finished product. And for all the nerds out there; yes, you can wield it.