A kit for making boxes from paper card stock. The kit has a flat plate with a guide rail with a vertical edge projecting above the surface of the plate parallel to one edge of the plate. A scoring groove traverses the plate parallel to the vertical edge of the guide rail. One or more spacing strips, each having a vertical edge, may be placed between the vertical edge of the guide rail and the scoring groove to vary the depth of the box. The overall size or "footprint" of a box made in accordance with the invention is determined by the distance of the scoring groove from the nearest vertical edge and the size of the blank card stock employed. Two identical sized card stocks are used for each box. A slightly wider spacing strip is used to form the top than the spacing strip used to form the bottom of the box. This also makes the depth of the box bottom slightly greater than the box top. The kit includes a scoring plate, two sets of spacing strips and a scoring tool, and is used to fashion boxes in a variety of shapes and sizes. In another embodiment of the kit the scoring plate has guide rails and score lines on both sides, wherein the guide rail on one side is spaced slightly further away from the score line than on the other side to make the box bottom slightly smaller in size than the box top.