When we buy new objects we deal with large amounts of cardboard along the year. Most of the time the board is broken and sent to recycle. But the next time you have a cardboard box at home, save it and put to the test by making a cardboard chairs. They can be made without using glue. Cut two parallel grooves in a cardboard sheet 24 by 24 inches. They should be on one side of the plate.
The slots should be at a distance of 3 inches from each edge. This is the back of the cardboard chairs. Make a slot at one end of the two cardboard sheets remaining 24 by 24 inches. Cut another slot in the two side pieces as wide as the thickness of the board you are using. Slots located in the opposite upper corner of the side seat.
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It should be 12 inches deep. Place the sides parallel to each other so that they are separated by 18 inches. Align them in the bottom of the back piece with inclined slots in the upper rear side corner. Fold the cardboard sheet 36 by 24 inches in half measuring 18 by 24 inches. These are the parts of cardboard chairs.