Also please excuse a couple of the over exposed pictures. It helped to show the tape. And I know this Instructable isn't much, but it's something I've always wanted to do.
Step 1: Gather materials
-Two candy boxes. Can generally be any shape and size, but both should be the same.
-(optional) cool decorative knife
I found the candy at Walgreens. They have a sweet deal on a lot of the old school candy. Three boxes for three bucks. It will also works with boxes as small as Dots.
Step 2: The outside box
Start by cutting all of the flaps off the front. You may have little bumps where the flap folded. You can cut this off and make it look better if you want.
Next tape the four sides putting the tape half way one one side and folding over the side. After you tape the four sides put a piece of tape on the corner and cut it down the middle (note: cut the tape only). After you cut the tape, fold the rest inside.
Tape the back just for safe keeping. Put one large strip across and then cut diagonally toward the corner (see picture 7) on all four sides. Fold the top and bottom strip over first and then fold the two sides.
The outside box is now finished, so lets move on to the inside.