Our Solar System (11 titles)
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Amazing Skyscrapers
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Invasive Species (14 titles⁎)
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Amazing Bridges
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Amazing Architecture (6 titles⁎)
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Exploring Biomes (6 titles⁎)
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Amazing Museums
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Ciclos de vida (Life Cycles) (8 titles⁎)
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Amazing Roller Coasters
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First Experiences (20 titles⁎)
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Facing Life's Challenges (8 titles⁎)
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On the Move with Adélie Penguins
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Zona de construcciуn (Construction Zone) (6 titles⁎)
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If I Met an Ice Age Animal (12 titles)
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Amazing Stadiums
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Need for Speed (6 titles⁎)
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Autos de carreras (Need for Speed) (6 titles⁎)
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Amazing Libraries
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Math Adventures (5 titles⁎)
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Life Cycles (8 titles⁎)
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Exploring Our Oceans (5 titles⁎)
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3.3 |
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Amazing Migrations (6 titles⁎)
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El ciclo de vida de un salmуn (A Salmon's Life Cycle)
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Regions of the United States (6 titles⁎)
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