character: Echo the Sound Eel
topic: Understanding Echoes and Sound Waves
grade: 6
subject: Science
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character: Sound Wave Sally
topic: Properties of Sound Waves
grade: 6
subject: Science
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character: Frequency Freddy
topic: Wave Frequencies and Pitch
grade: 6
subject: Science
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character: Reflection Rachel
topic: Reflection of Sound Waves
grade: 6
subject: Science
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