Extra Yarn is a book about a girl who finds a box of colorful Yarn.  She then starts knitting sweaters for everyone but she never runs out of yarn in her box.  She continues to knit colorful sweaters for everyone she knows when an archduke tried to buy her box of yarn from her but she would not sell it.  He then steals the box from her.  When the archduke opens the box it is empty.  He then throws the box away and it finds its way back to the little girl.  The illustrations by Jon Klassen started out black and white but as the girl knitted more sweaters the book became more colorful.

I would use this book to talk to students about being kind and giving to others.  I could then use the archduke as an example of how people who are unkind and are mean to others really don't win.