Step 1: Begin with a 9-inch-square piece of paper; use a bone folder to crease each fold as you go.
Fold paper into thirds horizontally. Open up the paper, and fold into thirds vertically. This will result in a checkerboard of creases.
Step 2: Start at one corner square: Bring folded edges together, and crease the fold that forms between them. Repeat at other corner squares.
Step 3: Draw two of the corner folds together, overlapping them to create sides for the box. Repeat. To secure the sides, dab a dot of white glue between the two overlapping points. The finished box will look slightly loose and sculptural rather than rigid.