Get a sheet of paper A4, and fold it in half lengthwise.
Fold the top corners into the center.
Fold the top corners into the center once again.
Open up the paper.
Unfold the top corners.
Fold the paper down the crease .
Turn the item to the left.
Fold the bottom corners inward.
Fold the side elements.
Fold the item in half from the left to the right.
Fold the flaps downward to make the wings.
Spread out the wings.
Unfold upper elements of the wings.
The plane is ready!