Aztecs and Incas - Venn Diagram

I'm up and going. It rained last night so I'm really interest in getting out in garden (she says facetiously). :) Today the plan is to complete the venn diagrams for the Aztecs and Incas. For history we use the History of World as a jumping off point (we're starting book three). We really enjoy the stories, maps and activities however we like to dig a little deeper hence the venn diagram idea. I have done this very simply by reading out loud Great Civilizations Aztecs and Incas AD 1300-1532 by Penny Bateman and having the kids remark when they hear something interesting about the culture of each empire. We have a huge piece of paper separated in two columns, one column titled Incas and the other titled as Aztecs, as we come across interesting facts we list them under the correct heading. Today we are finishing the Incan portion, and reviewing all the info we gathered and creating our venn diagrams. The hope of course is by doing it this way I can give an assignment to compare something and they can do it on their own. We also printed out maps of the Americas and marked each empire on the map. Here's some movies we've watched: Ancient Civilizations for Children Ancient Inca; National Geographic Incan Mummies Secrets of the World, Ancient Civilizations Fall of the Aztec and Mayan Empires and Globe Trekker Central America. Books we've been reading: Cortes and the Aztec Conquest by Irwin Blacker; Children of the Incas by David Mangurian; The Spanish Conquests in the New World. Okay, I'm off to put hay on strawberries -- in the rain! :)