Some images may be useful, the first few are maps showing where some of the civilizations were located. This is an easy to use site. The six civilizations include Japan. You can choose to visit the cities of ancient civilizations via images, tours and movies. These include Rome, Athens, Egypt, Americas, China, and the Norselands.
Some Latin instruction is included, there is a crossword puzzle page and historical trivia.
Teachers, be aware that there is a live chat room link on this site. This site was built by a college professor. A nice set of links focused on Africa. This page is more about time than ancient civilizations, but it is fun and interesting as well has having good information and graphics. Lots of topics, shows everywhere there is a timeline on the web.