What will Andy See on the Great Wall?

Andy is back! He is going to walk the entire Great Wall of China and we get to go along! I wonder what he will see and do while he travels the Great Wall. I wonder if it will be easy, or hard, or dangerous? I wonder if Johnny will get attacked? Do you think he will make it to the end of the Great Wall? 

Student Task: Research/discover information/facts about the Great Wall of China. Here are two websites that can get you started. Feel free to search other sites on your own. I want you to find out as much of the Great Wall as you can. Some things to search for: length, what types of people worked on the Great Wall, what type of materials, why it was built, what dynasty/emperor connected all the walls to make one solid wall, the story about the Dragon and the Great Wall, uses of the Great Wall, etc.... 
Ducksters: Great Wall of China
Mr. Donn's Great Wall of China