Take a sheet of A4 (or letter) size paper and fold the upper corners to meet the center line.
Fold the side parts to meet the center line and then fold both flaps outward, making them stay together on the top.
Fold the item in half to the left.
Fold the right corner to the left almost in half along the creases you’ve made, hidden inside. Then unfold.
Fold the right corner to the left again, below the previous crease. Unfold.
Unfold the item.
Turn the item over.
Rotate the item.
Fold the tip inward and unfold to make the nose. Make four folds parallel to the plane’s fuselage to make the tail.
Draw windows, and the Concorde is complete!