Kaatje Kooiman is a character from the popular Dutch children's television series called Sesamstraat, which is the Dutch version of Sesame Street. She is known for her friendly personality and her role in teaching children about friendship, sharing, and problem-solving through fun and engaging stories. In the show, Kaatje often interacts with other beloved characters, such as Elmo and Pino, helping to create a warm and educational environment. The series aims to promote early childhood education and social skills, making Kaatje an important figure in the lives of young viewers in the Netherlands.