character: Dr. Sound Wave
topic: Understanding Sound Waves
grade: 3
subject: Reading
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character: Captain Echo
topic: How Sound Travels
grade: 3
subject: Reading
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character: Lucy the Loudspeaker
topic: The Science of Sound
grade: 3
subject: Reading
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character: Sonic the Explorer
topic: Vibrations and Sound Waves
grade: 3
subject: Reading
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