Print off a copy of the pdf (acrobat reader) file for the printable storage box base and another if you wish for the printable box top. Use lightweight card or photo paper if you want a sturdy storage box, or print off a copy on regular paper to glue it to lightweight card (a cereal box, a used file folder or something similar.
Cut the square printable away from the page. If you are following the instructions to make boxes from recycled paper,cut a square of recycled paper from a calendar or some other heavy paper.
Fold the printable on all the fold lines on the page, as shown in the photo above.
If you are using recycled paper, create the fold lines by folding the square of paper you have exactly in half, unfold it, and fold it in half in the opposite direction to mark the four corners.