Brilliant Star magazine has many wonderful materials to enhance your children's classes.  This magazine is provided free of charge to children in the United States.  You can also order an international subscription by going to their website.

http://www.brilliantstarmagazine.org/

Suggestions include:  

Lesson 1: Unity - "Nur's Nook: Beat of Unity" (May/June 2010, p. 8)

Lesson 2: Purity of Heart - "Maya¹s Mysteries: Your Radiant Character" (January/February 2010, p. 5)

Lesson 3: Justice - "What Do You Say?" (March/April 2010, p. 5)