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This beauty is a deadly little design. It takes regular party poppers and turns them into ferocious firepower. It works by inserting a stripped down party popper into the back of the barrel of the cannon and loading a BB bullet into the front. When you pull the party popper string it sends the BB flying at incredible speeds (~ 20 meters).
To prepare a party popper for use all that needs to be done is the entire contents of the party popper must be removed excluding the popper string and charge. I will endeavor to put some more photos and perhaps a video up soon showing the strength of this projectile.
Please note that at this point, this has not yet been printed through shapeways, only on my own personal 3D printer.