Make Gloria Sanok's Liter Box

Materials Needed:: · 2 or 4 large paper clips; · a paper grocery bag; · a metric ruler; · a pencil or marker; · a pair of scissor.

To Assemble:
1st: Cut open a heavy grocery bag at the seams to make a 30 cm by 30 cm sheet of paper. On the paper, accurately draw a 30 cm by 30 cm square and then a tic-tac-toe shape with lines every 10 cm.
2nd: Cut out the tic-tac-toe square and fold back-and-forth the remaining lines so each easily folds. In the four corner squares, crease the square on the diagonal as shown and be sure each diagonal folds easily. The corner diagonal folds are important. Perhaps pinch the paper between your thumbnail and forefinger to make the crease or fold very sharp and more flexible.
3rd: Cut the corners off the square, rounding the corners.
4th: Label the paper with at least these markings. The grid is marked every 1 cm making a 100 square region. You might wish to number each of the small 1 cm by 1 cm squares so that the numbers from 1 to 100 are visible.
5th: Use either 4 or 2 paper clips to assemble the box, printed side out. Each of the four rounded corners is pinched together and folded into a flap and clipped to itself (uses 4 clips) on the inside of the box: or to the inside (uses 2 clips) of the box istself.
6th: Display the side of choice. If the paper clip blocks the side you wish to use, move the paper clip and reorient the box. The box may be disassembled for storage.