Sometimes it's difficult to explain poverty--or the importance of charity--to children. Good books can bridge that gap of understanding.
I've tried to highlight every good children's book I've found on this subject. Thanks to the readers who recommended The Rag Coat by Lauren Mills.
The narrator is an Appalachian girl who can't afford the coat she needs to attend school; her beautiful patchwork solution is made fun of by the other students. The Rag Coat's charming illustrations and snowy setting make it a great family read-aloud before gathering your outgrown coats for a winter clothing drive.
From the archives, other children's books related to thrift and/or scarcity of resources:
Joseph Had A Little Overcoat
The Ox Cart Man
The Hundred Dresses