Using ordinary objects and combine them with some drawing to create images. Leaves and chocolates/dessert signify the nature and the children. Fighter aircraft dropping leaves instead of bombs ; spray out leaves instead of tear gas from the tear gas grenade; leaves as the bullets of the gun ; a hand grenade made by leaves and flowers.
It would be more interesting/fun if dropping alot of almonds, chocolate rice, chocolate candy, cocoa powder and donut in a war. This would be much more better for the children or even this is a dream for them.
In fact, war is cruel.