Take a sheet of A4 (or letter) size paper and fold it in half downward.
Fold the item in half sideways to make a crease and unfold.
Fold the right part of the item, creasing from the right bottom corner to the top of the previous crease. Unfold.
Fold the left part of the item the same way and unfold.
Open the side parts, making the two halves of the edge meet the previous creases.
Fold the central flaps away from each other.
Fold the top layers of the top edges to meet the lines of the creases you’ve made.
Fold the side flaps toward the center.
Turn the item over.
Fold the top edges to meet the lines of the creases you’ve made.
Fold the top edges toward the center along the previous creases.
Fold the item in half sideways.
Fold the first wing.
Fold the top layers of the corners inward.
Fold the side corners backward.
Fold the second wing.
Spread the plane’s wings.
Unfold the nozzles.
The Jet is complete.