a simple box with square stable ends. bottom and one wall are 1 layer, the other side wall is 2 layers.
to produce a box that is x” by y”, use a sheet of paper that is 4x” by (y + 2x)”. sample grid box is 6 squares by 12 squares, made from a 24×24 sheet. to make a cube, use a sheet that is twice as long as it is wide.
