Mister Rogers demonstrates blowing bubbles. He visits Mr. Zandhuis, a glass blower, and helps him complete a project for Mrs. Saunders. Mrs. Saunders shows how she will use the balls to teach children about addition and subtraction. Before Mister Rogers leaves, Mr. Zandhuis gives him a small glass crown. In the Neighborhood of Make-Believe, King Friday wants Lady Aberlin to teach subtraction to Prince Tuesday. Mrs. Saunders explains that he has already learned a great deal, but he is too little to learn subtraction. Back at the house, Mister Rogers talks about learning at school and at play.