Take a square sheet of paper, fold in half sideways to make a crease and unfold.
Fold in half downward and unfold.
Fold all four corners to the center and turn the item over.
Fold the four corners to the center again and turn the item over.
Fold the same way again and turn the item over.
Open the top and the bottom corners.
Pull the inner corners sideways to open the steamboat.
The steamboat is complete!