Gravitational Force activities (Making a Parachute)

This is how my parachute look like

Me making a parachute

Today, (Tuesday, 10/4/2012), we made a parachute for science. It is to understand more about gravitational forces around us. So, here is what we need:
1 big plastic bag (but not too big)
a bundle of string (not to thick)
scissors
a small toy

Here is how we made it:
1. Cut one side of the plastic bag into a circle.
2. Pierce small holes surrounding the circle. Do not use scissors because it will pierce big holes. Use Pen/Pencil.
3. Cut the string (approximately 50cm each) according to how many holes you pierced. (ex. if you pierced 5 holes than cut 5 strings)
4. Tie the each of the strings to each of the holes. Tie it twice so it won't untie.
5.  Attach the small toy to the bottom of the strings

And now your parachute is ready to be tested.
I tested it from the 3rd floor of my school, i tried it twice, the first time it succeed, but unfortunately at the second time, my parachute was stuck in one of the window holes. But luckily the iss (school helper) used a long stick to make the parachute not stuck. So it did. Thankyou really much.

This activity is very interesting to me because it is another way to learn about gravitational forces. And its also really fun because we can test it on our own! :D