character: Builder Bella
topic: How Materials Affect Building Design
grade: 4
subject: Science
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character: Builder Bella
topic: Different Types of Materials in Construction
grade: 4
subject: Science
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character: Builder Bella
topic: The Importance of Strong and Durable Materials
grade: 4
subject: Science
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character: Builder Bella
topic: How Climate Affects Building Materials
grade: 4
subject: Science
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