When Lord Cucuface becomes suddenly indisposed, Madeline takes over his mission to impress some American tourists who are potential donors to the girls’ school. She tells them that she is a famous tour guide, and finds she must lie more and more as she takes the eccentric couple around the Louvre, until they are all hopelessly lost and she is forced to come clean and tell the truth.

Madeline convinces the young Prince of Monaco to remove his crown so he can spend an afternoon as an ordinary boy. But when the children return from the park, the priceless crown is missing. Using her superb detective skills, Madeline launches a citywide search that eventually implicates Pepito! But when Madeline discovers that the prince himself has hidden the crown, she devises an ingenious way for him to be a prince - and a child - at the same...

When Madeline and the girls go to Dr. Cohn for a physical, all the girls have grown several inches except Madeline, who has a dream that she will be Tom Thumb-sized for her whole life. In the end, she feels better when she discovers that Georgette, the tallest girl, has size issues as well.

Nicole is embarrassed when she is asked to read a letter from her aunt, and it is revealed that her reading skills aren’t as developed as the other girls. It turns out that her aunt has sent tickets to her and the girls to go to Africa. With Lord Cucface tagging along, Miss Clavel and the girls join Nicole’s aunt for a safari. There, they meet a friendly little gorilla named Rosie, and thru her, Nicole learns that she shouldn’t be ashamed...

For their entry in the Science Exhibition, Madeline and the girls create a magnificent scale model of a hot air balloon. During the exhibition, Genevieve falls asleep in the balloon's basket and the balloon inadvertently takes off. With Genevieve floating over Paris, Madeline and Pepito enlist the aid of Professor Windbag, a hot air balloon "expert" who is more full of hot air than knowledge. Madeline and Pepito ascend with the professor in a real...

When Madeline and the girls go to New York to meet their culturally diverse penpals and celebrate Halloween, Madeline finds some mysterious spider earrings in her trick or treat bag which she traces to Miss Clavel's missing cousin Fifi, a famous radio star.

When Madeline gets a pair of new ice skates for her birthday, she becomes so obsessed with practicing her skating that she neglects all her other responsibilities and friendships, and finally finds that ice skating has become a chore rather than a fun hobby.

When Miss Clavel brings in a "method" acting teacher to direct the girls in a play, Madeline is sure she will get the leading role. Disappointed when given supporting roles (as trees) Madeline and her friends plan to boycott the play, until Madeline discovers that even small part can be important and fun, and that the girl who won the lead really deserved the part.

Madeline, the girls, Pepito, and his three naughty cousins go on a field trip to Egypt. Nicole becomes terrified when they experience a series of mishaps - from getting locked in the museum to getting caught in a desert dust storm on camelback. Then the group gets lost in the pyramids and encounters a mummy who speaks to them in an echoey voice and curses them with bad luck! But brave Madeline confronts the "mummy" and discovers that Pepito's mischievous...

Madeline and girls visit Miss Clavel’s cousin Fifi at the radio station for the Halloween broadcast and accidentally leave the microphone on as they tell a scary story about ants invading New York, which is broadcast "War of the Worlds" style all over the city, sending all of the metropolitan area into a panic.