How to make a paper box

Fold the sheet of paper into three equal panels, pressing the creases with the thumbnail so they come out sharp.

Fold each outer panel into two lengthwise, again pressing each crease with the thumbnail.

Fold the four corners of each outer panel inward and in line with the center crease.

The folded paper should now look like this, flat with a slit at the center.

Fold each pointed end inward to create a triangular shape.

Carefully open the center slit.

Press along the corner and bottom creases to shape the box.

You've created a paper box!