character: Healthy Hannah
topic: Nutrients Essential for Bone Density
grade: 9
subject: Science
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character: Nutrition Nelly
topic: Importance of Calcium and Vitamin D
grade: 9
subject: Science
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character: Bone Builder Bob
topic: Exercises for Strong Bones
grade: 9
subject: Science
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character: Mineral Mike
topic: Role of Magnesium in Bone Health
grade: 9
subject: Science
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