This is one of those rare picture books that deserves its bestseller status. The concept is fresh and funny, the execution is sharp, and it actually teaches something valuable about empathy and problem-solving without feeling like a lesson.

The letter format is genius—each crayon has a distinct personality and legitimate grievance (Blue is tired of coloring all the water, Beige feels neglected, Orange and Yellow are in a fight about who's the real sun). Kids love the humor, and parents appreciate that it's not annoying to read for the 47th time.

It's also genuinely useful for teaching perspective-taking. Kids start to understand that everyone experiences the same situation differently, which is a foundational empathy skill. Plus it might inspire some creative writing or art projects.

At over a decade old, it's still completely fresh and engaging for modern kids. No dated references, no tired tropes—just a smart, funny book that works.