Introduction: Rectangular Box

Recycling paper

Step 1: Make Two Parallel Foldings

Step 2: Join Two Parallel Folds As Shown

Step 3: Do the Same on All Four Sides to Look As Shown

Step 4: Staple All the Four Folding to Look As Shown

Step 5: Make Two of Them

Step 6: Slide One of the Box on Top of the Other