Today in our class we were talking about air. We tried to get a balloons to fly in a straight line. They never do. When you blow up a balloon and then let them go they fly in all directions.We finally got a balloon to fly in a straight line by attaching the balloon to a string with a straw and some selotape. This time the balloon flew in a straight line. We even got the balloon to fly uphill a
nd downhill by having one end of the string higher than the other.
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