character: Leo the Time Traveler
topic: History of Roman Engineering
grade: 3
subject: Social Studies
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character: Leo the Time Traveler
topic: Inventions of Ancient Rome
grade: 3
subject: Social Studies
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character: Leo the Time Traveler
topic: Famous Roman Structures
grade: 3
subject: Social Studies
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character: Leo the Time Traveler
topic: Roman Aqueducts and Roads
grade: 3
subject: Social Studies
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