character: Building Billy
topic: Understanding Material Strength and Uses
grade: 3
subject: Spelling
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character: Construction Cat
topic: Why Different Materials are Used
grade: 3
subject: Spelling
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character: Sturdy Steve
topic: Properties of Wood, Metal, and Plastic
grade: 3
subject: Spelling
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character: Smart Sally
topic: Measuring Material Durability
grade: 3
subject: Spelling
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