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Matraca
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In this activity, learners create a traditional Mexican noisemaker (a matraca) using cardboard, craft sticks, and a wooden dowel.
Extreme Sounds
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This activity (on page 2 of the PDF under SciGirls Activity: Extreme Sounds) is a full inquiry investigation into sound.
Making Vocal Cords
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In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw.