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WindBag™
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How many breaths does it take to inflate an eight-foot long bag? Fifty, twenty, ten? Your students will be amazed when they see the bag can be inflated with just one breath! You can explain that the secret lies in a scientific principle that involves low pressure and fast moving air. The WindBag™ can also be used to learn about other properties of air and makes a great science fair project. Contains instructions and demonstration ideas. Package of three.
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