There is a good website about ancient China that gives some great highlights about its history. Mrs. Happy Housewife mentioned it on her blog today.
Here are a few highlights I found :

Emperor Chin or Shi Huangdi, 246-210 BC

This video is the first part of nine. It is recommended to look at these before showing them to your family. There is graphic violence in some.
The Secrets of the Great Wall of China

This is part one of a 15 part progam called Mysteries of Asia: The Secrets of the Great Wall.
Making of Terra Cotta Warrior

The Terracotta Warriors in Xi’an in China. Part 1 of 3