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National Geographic Kids magazine (formerly known as National Geographic WORLD) includes features, games, stories, jokes, postcards, screen wallpapers, and ideas for science projects, crafts, and more.
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Every living thing -- celery included -- is made of different kinds of cells. Each cell has its own special job to do. Some cells store food; others absorb water. Cells don't have doors for food and water to get in, though. The cell walls are like a special film or fabric.
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