Arthur has to write a story as a homework assignment and keeps changing his idea of what to write as he talks to his friends.

Arthur finds everything about Halloween scary, including his little sister's costume, his morning snack, and the big house on the corner.

Unhappy with his nose, Arthur visits the rhinologist to get a new one.

Anxious to see what life is like outside the zoo, Sammy the seal explores the city, goes to school, and plays with the children but decides that there really is no place like home.

When Chucky Ducky feels the earth beneath him grumble and rumble, he runs to alert the other barnyard animals to the coming earthquake, but just as a wily weasel is about to take advantage of their fears, the true source of the rumbling is revealed.

After a bee scares the cock-a-doodle-do out of him, Rooster anxiously searches the entire barnyard for it.

Determined to prove that the cow he meets is really a moose, Morris the moose enlists the help of a rather confused deer and horse.

As Grasshopper sets out to follow a road, he meets some unusual characters.

Sue Ellen loses her diary and Arthur and his friends imagine what she has written about them in her private book.

Arthur's wrong guess about the identity of the secret admirer sending him valentine messages leads to teasing by the other children, but clues in additional messages allow him to get his due.