Flying origami crane.

Step 2 First impressions.

Here we make our first crease. Using a standard sheet of paper, fold one corner to the opposite side of the sheet, until it goes no further. Don't go over the line, don't stop short. Try to line it up as close to the edge of the paper as possible. Now using your thumbnail, or some other hard implement (pen, knife, toenail), bear down on the crease and pushhhh. You will now have a crease that will be the envy of all the kids in the neighborhood.