For the balloon experiment we blew up a balloon about halfway, but we didn't tie the end. Then we put our target wherever we wanted it. After we went and stood on our launch pad and let go of the end of the balloon. The balloon would soar into the air then come down somewhere that was nowhere close to the target. Then we would measure the distance from the target to where the balloon landed. The distance I usally got was somewhere in between 300 to 400 centimeters. I did pretty good if I do say so myself. A few times I let go of the balloon and it went behind me! It was an awesome science lesson!
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