"The Day the Crayons Quit" is a children's book written by Drew Daywalt and illustrated by Oliver Jeffers. The story features a young boy named Duncan who discovers that his crayons have decided to go on strike. Each crayon writes a letter expressing its frustrations and feelings about how it is used, or in some cases, not used at all. The crayons include colors like Red, Blue, Green, and Pink, each with unique complaints. For example, Red feels overworked from coloring fire trucks and apples, while Beige is tired of being overshadowed by Brown. The book creatively explores themes of creativity, individuality, and the importance of every color in a child's imagination.