As a Resource Specialist Teacher I constantly have to run google searches in order to find information to better support my students. During one of those searches I ran across this great website:
https://sites.google.com/site/mrvailsclass2/home
It is a perfect site for an introductory lesson of East Asia History made for kids. It has vast information of different time periods and empires. Best of all it is in kid-friendly language. It has many links embedded that present visuals for the students of artifacts or locations. Students can easily navigate this site and gain knowledge about East Asia. It's a great site.