Episode 2875

{{episodesesame|plot=|airdate=May 10, 1991 (season finale}|season=Season 22 (1990-1991)|sponsors=I, M, 15|syndication=|DVD=}}


 * Cartoon: M is for Marvelous Martha


 * The American Revolution: The founding fathers argue over what bird should be chosen as the national bird.


 * Cartoon: Sand I/i


 * Cartoon: An animated number 15 sings "How Hard It Is to Be 15" to a child who is trying to count from 1 to 20, but can't remember 15.