Take a square sheet of paper; fold in half upward to make a crease and unfold.
Fold the paper in half sideways and unfold.
Turn the item over.
Fold the paper diagonally and unfold.
Fold along the other diagonal and unfold.
Fold all four corners to the center.
Fold the inner corners outward and unfold.
Unfold two diagonal corners.
Fold the diagonal parts to meet the center line and then unfold to make the walls.
Fold the four corners inward, making four vertical folds from the side corners of the bottom triangles, and lift the other two walls.
Fold the wall inward and flatten.
Do the same with the last wall.
The box is complete!