Little Miss Sunshine is one of the most popular Little Miss characters, known for her bright yellow color and her endlessly cheerful disposition. Her story follows her quest to bring happiness to others, particularly the persistently gloomy Mr. Grumpy. She travels all the way to Miseryland, a place as dreary as its name suggests, to find the miserable Mr. Grumble and convince him that life is worth smiling about. The book is a lovely, optimistic tale that champions a positive outlook, emphasizing the contagious nature of happiness and the power of a friendly, determined spirit to cheer up even the gloomiest of people.