I was looking for some clip-art for my Ancient timeline, and found this AWSOME page of links. I've looked at some of the sites listed and they are incredible! I played a game about Ancient Egypt with King Tut, and viewed museum exhibits. They had prehistoric art, too. Anyone doing the Ancients this year needs to check this out!
I think this is it, Tina! http://www.kathimitchell.com/ancivil.html I've several sites bookmarked, so if it's not the right one, tell me and I'll check some of the other bookmarked sites.