In this activity, you'll make a model of the countryside and a simple glider. Then, using a blow dryer as a wind source, you'll recreate the air currents and thermals that a hang glider would encounter. Get a few different thicknesses. You can use books standing on end to be buildings or lying propped open for cliffs. Cereal boxes, milk cartons, and teapots can be city skyscrapers.
Pillows can be mountains, and so on.
Drop the pieces of paper just as they are to the floor from a height even with your chest. The air pressure below the paper is being released in random spurts. The fold is dividing air pressure equally on either side of it. Using the blow dryer on a low, cool setting, turn your floor into a hang glider's paradise. Have a friend sit on the floor and hold the blow dryer even with a structure, while you fly your gliders over, around, and through your buildings and mountains.