table of contents CHAPTER 1 Many Walls 4 CHAPTER 2 2,000 Years 10 CHAPTER 3 Obstacles 18 ACTIVITIES TOOLS Try This 22 Glossary 23 Index 24 To Learn More 24
chapter 1 MANY WALLS You probably know that the Great Wall of China is a very long wall But did you know it is the longest structure ever made by humans Or that there is rice in its mortar
