character: Echo the Sound Detective
topic: Exploring Different Types of Sound Waves
grade: 4
subject: Computer Science
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character: Waves the Wonderer
topic: Understanding Sound Waves and Their Properties
grade: 4
subject: Computer Science
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character: Sonic Sam
topic: The Journey of Sound in Our Environment
grade: 4
subject: Computer Science
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character: Frequency Fred
topic: How Sound Waves Change with Frequency
grade: 4
subject: Computer Science
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