Arranging the material
Arrange all the things mentioned above in one place so they are easily in your reach. Now start cutting handkerchiefs for parachutes. Leave 1 inch space from the boundary of one handkerchief, 2 inches from the second and 3 inches from the third. Do not cut any part of the fourth handkerchief.
Fasten strings with handkerchiefs and fishing weight
Now you have 4 handkerchiefs of different sizes. Cut about 16 lengths of strings and make sure each length is exactly 12-inch long. Fasten four strings at a time to the corners of each handkerchief and then tie four strings to the fishing weight.
Release the parachutes
Now one by one start releasing the parachutes in the air and make them fall from the platform where you are standing on to the ground. It will be noticed that the biggest sized handkerchief took longer time to reach the ground. Hence, bigger the size of a parachute, the more time it will take for the object to reach the ground.