Annie and Nina are super best friends and do everything together until Nina's cousin Irina arrives from Russia to live with the family.

When Cousin Henry gets all the attention in the grown-up musical in which they have roles, Angelina becomes jealous, but she demonstrates her fondness for him when a crisis occurs on opening night.

While trying to recover from their accidental underwater adventure, Andrew, his cousin Judy, and Thudd the robot are swallowed by a blue whale, the world's largest creature.

Shares the adventures of canine cousins, Dog and Wolf, who live very different lives but continue to get each other into mischief.

When his cousin Opal loses a tooth during a visit, Puddle dresses as the Tooth Fairy so that Opal's hope of receiving a shiny quarter will not be disappointed.

Shortly before her thirteenth birthday, shy and withdrawn Tara is sent to stay with her aunt, uncle, and cousin in her parents' hometown of Willow Falls, where she makes friends and becomes involved with an elderly buyer and seller of collectibles, who seems to be trying to give Tara some kind of mysterious message.

While visiting Houston, Texas, Mike and Kate tour the Johnson Space Center with an astronaut in the morning and at the Houston Astros' ball game that evening, the cousins search for the person who steals the astronaut's moonrock when he arrives at the stadium to sign autographs.

When Margie's cousin Lupe comes from Mexico to live in California with Margie's family, Lupe must adapt to America, while Margie, who thought it would be fun to have her cousin there, finds that she is embarrassed by her in school and jealous of her at home.

Forced to take shelter when their Syrian city is plagued with bombings, young Nour and her cousin begin to bravely build a secret underground library.