Christopher Plummer

Lord Cucuface arrives at the Old House with a large chunk of prize-winning cheese (for fondue) and a new touring car. While Cucuface takes Miss Clavel for a calamitous driving lesson, the mice eat the cheese.

In the middle of the winter holiday season, Miss Clavel gets called away from the Old House to care for her ailing aunt. Lord Cucuface replaces her with Mr. Grump, who is more of a drill sergeant than headmaster.

Pepito becomes frustrated when an old lamp from the Embassy attic fails to produce a Genie, and he throws the lamp in the trash. That night a frayed old Magic Carpet comes to Madeline's window and asks her help in finding the discarded lamp, because it does indeed have a Genie inside.

After Miss Clavel inspires the girls to read more books, they decide to put on a presentation of "The Hunchback of Notre Dame. " Pepito refuses to play the title role because he is embarrassed to portray an ugly, deformed character. In an attempt to change his mind, the group visits Notre Dame where a scary real-live hunchback swings down from the bell tower and carries off Miss Clavel!

Genevieve digs up a huge bone in the garden that turns out to be a fossilized stegosaurus' hip bone. The girls are thrilled with the discovery until the Old House becomes a dig site and is invaded by hordes of paleontologists and equipment. Calm is briefly restored after Miss Clavel convinces Lord Cucuface to donate the bone to a museum.

When the girls go for pony rides in the park, Madeline's pony, Gallop, (the smallest) does all sorts of fancy tricks and finally takes off, trotting across Paris! Soon they are discovered by Buffalo Ben, who invites them to appear in his touring Wild West Show.

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.

While on holiday in New York, the girls and Pepito attend a Yankee game, and Madeline catches the first home run ball of the season. A millionaire "rewards" Madeline by giving her the Brooklyn Bridge. Madeline is thrilled until a truck spills peanuts, popcorn and other snacks all over the roadway, causing the detained motorists to become irate. Madeline is given hero status when she donates the bridge to the city, and the girls are equally revered...

Madeline, Pepito and the girls visit Miss Clavel's aunt and nephew in their Alpine chalet. The trip is laden with adventure - from skiing and skating to an abominable snowman sighting. Later, when the group is trapped in the chalet by a terrifying avalanche, it is Madeline's spirit and ingenuity that saves the day.

The circus has been cancelled because Monsieur Funnybones, the world's shortest clown, has lost his ability to laugh. When the forlorn performer shows up at the Old House disguised as a chimney sweep, Madeline teaches him that being tall is just a state of mind.