Oobi and Uma make their own home movie.
Oobi and Kako think grown-ups have cool jobs, so they pretend to be grown-up firefighters, musicians, and businesspeople. Uma plays along but eventually convinces them that kids are cooler.
Grampu takes Oobi and Kako to Bella's supermarket, where the boys play with the fruit and unintentionally make a mess. Grampu helps them learn to respect other people's property and shows them how to pay for their food.
Uma wakes up in the middle of the night after having a nightmare. Grampu helps calm her down and teaches Uma how to turn her nightmare into a silly dream.
Grampu takes the children to a Chinese restaurant, where Uma learns how to use chopsticks.
Oobi wants to play outside with Uma and Kako, but he has to clean his room first. Uma and Kako sing a song and work together to help him clean up.
Oobi learns that trying new things is good when he visits Kako's house for dinner.
Oobi and Kako meet a deaf girl named Amy at the park. Her mother helps them learn American Sign Language so that they can communicate and play together.
It is Uma's first time trick-or-treating on Halloween. After Oobi teaches her all of the rituals, Uma takes Kako under her wing and helps him overcome his fear of Halloween.
Oobi visits his pediatrician's office for a checkup. He is nervous at first, but the doctor's kindness helps puts Oobi at ease.
Oobi, Kako, and Grampu take Uma on a pretend trip throughout the house.
Frieda invites Oobi to play with her and another foot named Frankie at the park. At first, Oobi does not know how to play with them because they like different games. However, Uma tells him that differences are okay and even points out some things that they have in common.
Oobi and Kako build a replica of their neighborhood out of boxes and paint. They give Uma a tour and show her the library, the post office, and the zoo.
Uma does not want Grampu to leave on her first day of preschool, but ends up having the time of her life when she meets her teacher and some new friends.
Maestru directs a musical performance of "Little Red Riding Hood", staged in the park. Oobi plays the wolf, Uma plays Little Red, Kako plays the mother and grandmother, and Angus steals the show as the woodsman.
Oobi meets a baby named Sophie and her mother, Sheila, at the park. Oobi feeds Sophie, changes her diaper, and rocks her to sleep.
Grampu prepares a special dinner of spaghetti and meatballs for his date with Inka. Oobi and Kako help by turning the house into an Italian-style restaurant. They turn on soft violin music, act as waiters, and serve fruit tarts for dessert.
Oobi and Uma follow a trail of hearts to find their mystery valentine, who turns out to be Grampu in a festive heart costume.
The kids put on their own parade after seeing a parade poster. Oobi wears a float costume, Uma becomes a majorette, and Kako dresses as a one-man band.
Grampu and Inka go out polka dancing and leave a playful babysitter named Randy in charge of the kids. Uma initially resents Randy, but his silly demeanor eventually wins her over.
Oobi and Angus perform at a piano recital. Oobi is very confident and helps Angus overcome his stage fright. However, when Oobi makes a mistake during his performance, he panics and runs offstage. Kako persuades him to try again, and soon afterwards, Oobi is able to play "Twinkle, Twinkle, Little Star" perfectly.
Oobi writes a storybook called "The Lost Umasaurus", in which dinosaurs named Oobi-Rex and Dino-Kako help Umasaurus find her way home.
Grampu takes the kids on a nature walk in the park. The highlight of their trip is seeing an eagle fly through the air.
Oobi and Kako decide to join Maestru's singing group after hearing a song called "Yo To Ho!" (based on the classical opera tune "Ride of the Valkyries").
Grampu takes Oobi fishing. They learn about patience and eventually catch a fish. However, Oobi feels bad for the fish and convinces Grampu that they should set it free.
Oobi, Uma, and Kako visit the park and pretend to be superheroes. They pretend to fly around and help people in need. When they find Mrs. Johnson's cat stuck in a tree, they use teamwork to bring her down