All you will need to make any of these planes is a single piece of paper. To build the dart, first, you will need to fold it in half once lengthwise. Next, unfold it. After, take the upper corner and fold it to the center of the paper. Repeat on the other side. Now, bend the outer tip back to the center. Next, fold it in half. To finish pull the outer edge on top down to line up with the bottom edge. Repeat on other side to finish.