Thanks to all for the feedback and resources. Teaching Tolerance was a good source for lots of various things. One of the links even gave me information in Spanish which I can send home with the five students who's parents speak no English.
I've been receiving Teaching Tolerance materials for several years, and I don't know why I hadn't checked there earlier.
Another good resource, for those who are eeking such things, was rethinkingschools.org which provided a lot of good information.
The important thing I want to do is to help the children discuss issues of war and peace in a sensitive environment, and I know that they don't always have a venue for those things.
Once again, thanks to all - even Wilco and Sins for the heads up on rationmality and keeping my opinions as my own.
A final note - there are many good songs about peace. Are there any songs about war which are simply about war and neither condemn it nor praise it?