Mr. Men is a popular children's book series created by Roger Hargreaves in the 1970s. The series features a variety of colorful characters, each with unique personalities and traits, represented by simple, bold illustrations. Each character's name reflects their defining characteristic, such as Mr. Happy, Mr. Grumpy, and Mr. Tickle. The stories are short and often convey moral lessons, making them enjoyable for young readers. Over the years, the Mr. Men franchise has expanded to include animated television shows, merchandise, and spin-off series like Little Miss, further captivating audiences around the world.