character: Echo Emily
topic: How Sound Travels
grade: 6
subject: Science
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character: Sound Sam
topic: The Physics of Sound Waves
grade: 6
subject: Science
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character: Vibration Victor
topic: How Vibrations Create Sound
grade: 6
subject: Science
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character: Wavelength Wendy
topic: The Properties of Sound Waves
grade: 6
subject: Science
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