BBD, or Big Blue Dog, is a popular character created by author and illustrator Margaret Wise Brown. This friendly, oversized dog is known for its bright blue color and playful personality, appealing to young children and their families. The stories often focus on themes of friendship and adventure, making them engaging for early readers. The character of BBD has been featured in various children's books and media, promoting literacy and imagination. Through its charming illustrations and simple narratives, BBD encourages children to explore their creativity and develop a love for reading.