I am currently making a coffin lunchbox, and right now I am having a design problem. The box is made out of cardboard and I plan on using narrow door hinges to open and close the box, plus I plan on placing the hinges on the inside. That is why my problem lies. I don't want an ugly bolt to be seen, so I figured that perhaps I can use wire to attach the hinges but at the same time hide that, so in order to do that I have to use the wire around the entire top of the lid and side of the box in a decorative pattern. Any ideas? Or if you have any ideas that can help hide nuts and screws, please share.

What if you sink the screws deep enough that there's a little indentation, and then fill the indent with something like spackle? Picture frames, made the old-fashioned way, had glue & nails in the corners; the nails were sunk into the wood and the holes were filled with a putty that matched the frame color.

Or, you could glue some jet black rhinestones on top of the screw heads.