THE COLOUR MONSTER is a popular book, and for good reason. It is a great book to help kids look at and identify feelings. The version I used is the board book, which was perfect for my ESL kids. It introduces HAPPINESS, SADNESS, ANGER, FEAR, CALM, and LOVE. But otherwise, this version felt like it was missing something.
For older kids or children at a higher level of English, the pop-up book version is gorgeous. Anna Llenas, the illustrator, has such a fun, unique style, and kids love watching it come to life in the pop-up book version.
In addition to being a writer, I have about the best job in the world. I teach 3-6 year olds English in an Italian preschool. I LOVE using picture books in my ESL lessons as introductions to my daily topics, and just because kids love books.