The exact origins of kickball are unclear, but it is believed to have been invented in the United States in the late 1800s or early 1900s. It is thought to have been developed as a simplified version of baseball, making it easier for children and people of all ages to play. Kickball was popularized by the National Recreation Association (NRA) in the early 20th century, and has since become a staple of physical education and recreation programs in many schools and communities across the United States and other parts of the world.