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Teacher Developed Classroom Tested

How many breaths does it take to inflate an 8 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 Wind Bag™ can also be used to learn about other properties of air and makes a great science fair project. Bags include an instruction sheet with demonstration ideas. Package of four.
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