S.H.
I don't know of any resources that you can use other then "Teaching Tolerance" which is a FANTASTIC program offered by the Southern Poverty Law Center. They have classroom kits by age level and there are various ideas to teach. (http://www.tolerance.org/activity/everyone-s-helper) My mom teaches at a multi cultural school and she always assigns her first family project of the year around this time. It is always a family essay on their beliefs, customs and unique traditions. Usually a one page essay that can be dressed up with pictures and drawings or small things that show the families belief. The whole school does this project and then they have an open house where the parents and children give a short presentation in the classroom on their customs and usually bring a dish they eat at home. It all ends with a big pot luck dinner where all the classes meet in the cafeteria and share the food. It is an awesome night and I actually took my son to one a few years back because in his public school this would never happen. He learned about so many different cultures and beliefs in just one classroom. I think it's wonderful that you want to do this and wish you the best of luck!