Mouse and Orange Balloon are having a discussion about the possibility of Mouse being a ballplayer. Although Orange Balloon is skeptical of the idea, this gets the narrator talking about the history of balls. She talks about balls being an old tradition, with eventually someone inventing rules and various types of ball games beingt created. We go inside a factory where toy balls are made. There, we see how rubber is manipulated in various ways such as rolling, heating, and squeezing to create balls. We see how the rubber is rolled in talcum powder to keep from sticking and how it is that they're painted. Viewers also get a look at the special process of creating red, white and blue striped balls. This takes three days of work, as each color must be dipped and dried. Although Mouse decides on a preference for hide-and-seek, the narrator encourages viewers to go further, by doing such things as writing a story about a ball, or considering the differences of various sports.