How to make one yourself
Take a plastic sheet measuring one square foot and tie strings to its four corners. The free ends of the strings be tied together to a light weight, box or bell. Make a small hole at the centre of the plastic sheet. Now you have a scaled down model of the parachute.
Take your parachute to the top of a high building and drop it. The air drag causes the parachute to fly down smoothly. The larger the umbrella of the parachute, the greater the drag on it.