This paper airplane design has been enjoyed and played with for 3 generations. The front is blunt so it can take a crash and keep going. It is simple, unique, and glides pretty well. (Usually better than in the video) All you need is a regular size sheet of paper, I used printer paper, and scissors.
You have the choice to watch the instructional video, read the step-by-step instructions, and/or view the step-by-step pictures.
Enjoy π
https://letsfixit.co.uk/wp-content/uploads/gravity_forms/7-360a393bb4f630dd690cefd9d3f75bc2/2012/09/Paper-AiGlider-from-Grampa-D.png
Your square should have a crease from one corner to the opposite. Now fold one creased corner to the other and open it back up. You now have an "X" crease in your paper. Flip it over and fold one side to the opposite side and open it back up. You should now be able to make the triangle like in the picture.
https://letsfixit.co.uk/wp-content/uploads/gravity_forms/7-360a393bb4f630dd690cefd9d3f75bc2/2012/09/FR9ISA4GTUGNOZD.MEDIUM.jpg
https://letsfixit.co.uk/wp-content/uploads/gravity_forms/7-360a393bb4f630dd690cefd9d3f75bc2/2012/09/FSCONW2GTUG0U4W.LARGE.jpg
https://letsfixit.co.uk/wp-content/uploads/gravity_forms/7-360a393bb4f630dd690cefd9d3f75bc2/2012/09/FOE3M5NGTQVOWJZ.MEDIUM.jpg
https://letsfixit.co.uk/wp-content/uploads/gravity_forms/7-360a393bb4f630dd690cefd9d3f75bc2/2012/09/FN0TMW9GTUGNOZ2.MEDIUM.jpg
You hold it by pinching it near the front and giving it a toss. I hope you enjoyed making your glider.