Mister Rogers demonstrates that heat rises by placing a vial of hot colored water into a tumbler of cold water.In the Neighborhood of Make-Believe, Lady Elaine has Mrs. McFeely make an appointment with King Friday. At the castle, Lady Elaine uses her Boomerang-Toomerang-Soomerang to turn the Neighborhood of Make-Believe purple. The king sends Handyman Negri to find out how the neighbors like the color. They do not like the situation. Lady Elaine changes the neighborhood back to normal. Back with Mister Rogers, he visits Chef Brockett and watches him fry an egg and make French toast.