The document discusses how teachers worked with children of different ages to help them understand the abstract concept of peace. Younger children ages 3-5 learned about peace through pictures, while ages 6-7 used storytelling. Ages 8-9 were taught that justice is important for achieving peace. Ages 10-11 created a mural with the ingredients needed for peace. The school was filled with peace messages on balloons, and the activities helped children understand what peace means and that it involves experiences like listening, sharing, and hugging.