An excerpt from a lesson plan for grades 4-6 provided by the Chocolate Manufacturers and National Confectioners Association:

Based on the USDA Food Guide Pyramid, discuss:

How a healthy diet is balanced by foods from all food groups
How food from any group can fit into a balanced diet provided correct food portions are observed
Where candy and chocolate fit into the Pyramid
How foods from the top of the Pyramid add flavor, texture, and sweetness to foods from the other food groups and make eating more enjoyable