Kids at school begin to make up their own languages. Arthur and Buster create "Arster-Buther", and Francine and Muffy create "Oola". George, however, feels left out because he can't understand any of it, due to his Dyslexia, so he comes up with a language of his own, a language without words.
A new line of dolls has come out. The "World Girls", figurines dressed to represent every nationality, are the new trend, and when the new superstore "World Girl World" opens, Muffy is determined to buy every single one, and brings along Francine, who is not particularly interested in it, and Sue Ellen, who has her heart set on finding only one specific doll, Pema. When she finds out that Pema was discontinued she also learns that they also canceled out Little Tibet altogether.moreless
Binky has always somewhat fancied himself as "tough," but when it comes to athletics, it seems he always chokes when it comes to the clutch. He decides to erase all evidence of his past failures and give up sporting activities for good, only to find that he's a natural at biking. Mr. Frensky compares him to the champion Vince Legstrong and convinces him to register for a race. Binky, however, is still worried about failure, but learns that it's important to have fun and the only person you're ever really competing against is yourself.
After a series of ear infections, D.W.'s been having some problems hearing. It turns out that she needs to have an operation to remove some fluid in her ears. At first she isn't scared because she doesn't think it's a big deal. When Arthur says that she's being brave, she begins to wonder if she really is so brave at all.moreless
Arthur finds himself the only kid at a "party for old folks." Heading away from the action, he instead becomes engrossed in a book titled 93 Million Miles in a Balloon (a bit like Around the World in 80 Days.) The books last pages are missing, however, leading Arthur on a frantic quest to try to find out the ending.
"D.W., Bossy Boots"
D.W. rates a "ten" on the boss-o-meter and lately her bossiness is causing her to lose friends. Stating that the problem is with everyone else, D.W. decides that she doesn't need friends anyway.moreless
Three new power hitters join the Elwood City baseball team, The Grebes. Buster and Harry are huge fans and attend almost every game. But when the team begins to lose the championship, Buster learns the story about a decades-old curse that was set on the team, and wonders if he is the carrier of that curse, because the Grebes seem to lose every game he is at.
"Arthur Changes Gears"
Arthur scrimps and saves to buy a special bike called the GX Trailblazer 10,000. This bike has all sorts of special features, such as a 21-speed skip-shift. When he finally gets the bike, though, he finds that it's so nice that he wants to save it for a "special occasion." Despite his friends pleas that he should ride his nice new bike, he just polishes it and admires it. But then a specter from the past shows up to show Arthur just what might happen if he simply leaves that bike to sit.moreless
It is almost Career Day at preschool, and D.W. is unsure of what she wants to be when she grows up, but after watching a space show on T.V., she is inspired to become to the first person to walk on Mars. The Tibbles try to trick her into believing that Mars is a dangerous place with giant martian lizards, which makes her start to wonder what's really there.
"Flaw and Order"
Dad's new crystal wedding cake platter is cracked, and Arthur is accused of breaking it after being caught on D.W.'s videotape, along with the off-screen noise of shattering glass. With the help of friends, Arthur and Buster launch a full Law and Order style investigation to find out what really happened. They become stumped trying to find out the source of an unknown sound that was also caught on tape.moreless
A drought comes to Elwood City, so residents are asked to conserve water. Due to their families' bad habits of wasting it, Francine and Arthur make a bet on whose family can use less water in one week. However, Francine soon finds that someone in her home doesn't seem to be living up the challenge, but she's not sure who. It becomes a sort of rivalry between Arthur and Francine, but despite Francine's best efforts, she finds herself losing.
Arthur and Grandma Thora are fans of the show Treasure Caravan, so when it's announced that the show is coming to Elwood City, everyone begins rummaging for their most valuable possessions. Arthur has high hopes that an old chair found in Thora's attic, very similar to one that fetched a high price on the show, will be just as valuable, or more. Meanwhile, Muffy is eager to show off a necklace that's been passed down in her family, but it is in for a surprise.moreless
Arthur and his friends are challenged by Mr. Ratburn to come up with the perfect food for surviving on a desert island. Brain becomes suspicious about why Mr. Ratburn would give out such an easy assignment. When everyone brings in junk foods on presentation day, they discover it's not so easy, and must dive deeper for the perfect food - one that contains all the essential elements. Arthur, Francine and Buster think they have it figured out, but Brain is seemingly obsessed with the perfect food.
"The Secret About Secrets"
D.W. wonders what the big deal about secrets is, until she's finally told one by her preschool friend, James, who is ashamed after splitting his pants. He reminds her that she cannot tell anyone, so D.W. desperately tries to find a way to stop herself from letting the cat out of the bag. She imagines that she's part of a secret club, but finds its not as fun as she thought it would be. She's worried by nightmares, and also by her friend Emily, who wants to know the secret.moreless