Grass Whistle
A fun science trick that my grandfather taught me.
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Crabgrass
Don't you have to use crabgrass for this? Please don't send me an email, just put a reply on here.
Actually, you can use many
Actually, you can use many different kinds of grass, other leaves, and even a narrow strip of paper. Some work better than others, but with practice, they will all work.
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