Take a piece of paper and mark its length using the ruler and the pencil in such a way that you obtain a perfect square-shaped paper after cutting along the marks with scissor.
As you will fold the paper, there will be four papers within the fold. Now fold one of the papers upwards in a way that it seems to be folded right from the center thus forming a triangle.
After folding one paper, now fold the remaining three in the same way from the center but in the opposite direction such that the resultant is a right-angled triangle.
On one side of the triangle, there will a slight fold. Now inserting a finger, fold the entire triangle by pressing it on the opposite sides.
Upon folding the triangle will again form a square shape with two closed and two open sides. At the point where the two sides of closed surface are joining, open the square moving both sides opposite from each other.
As you open the square, stretch the two ends with mild force moving them in opposite directions. Now you can see a ship with a yacht in the center.