Well, there's this to start you off.
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Of course its possible. If it weren't possible, then the guy there is magical and can do the impossible.
"If it happens, it must be possible."
Yup. Looks pretty easy, too. Cut a large box in half. Hinge it back together with duct tape or something. Mount it on a breastplate/harness/backpack thingy so it can still open and close. Put a box on your head and grab a toy laser gun. That's pretty much it, I think.