Arthur, D.W. and Buster build sand castles at the beach; Buster goes out of his way to avoid germs.
Arthur decides to sell old toys through his school's Web site; the Tibble Twins want to take their grandmother out to dinner.
Vicita asks D.W. and Arthur to re-create the story from her lost book; Prunella takes on more extracurricular activities.
Fern gets a cell phone; Brain does not want everyone to know that he was held back in kindergarten.
D.W.'s imaginary friend Nadine goes missing; Sue Ellen finds a mysterious diary onboard an old-fashioned train.
Arthur and his friends videotape themselves for Matt Damon's TV show; Mrs. Molina's dance class makes for odd dance pairings.
D.W.'s hiccups will not go away; know-it-all Brain gets on Buster's nerves.
Francine copies and pastes information from a Web site to use as her school report; everyone loves the new reality-TV series except Arthur.
D.W. tells her friends she is a fantastic skater, but she really is not; Muffy tries to prove to her friends that she is not spoiled.
When Binky's family adopts a baby girl from China, Binky worries about how his life will change and if his new sister will like him.