David Webb is pretty awesome. He came in yesterday with his wife, Joann Webb. Together, they performed many experiments. Joann Webb, his wife, was more like his assistant though. They were both very friendly and entertaining.
here is a link about vacuums! You may learn about how interesting it is and how it works.
http://en.wikipedia.org/wiki/Vacuum
Using the vacuum he inflated a marshmallow and it became HUGEEe. it was pinkk , too, so it was really pretty.
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