"Neighborhood!" is an episode of Oobi from the second season.
Oobi and Kako build a small version of their neighborhood out of shoeboxes and paint. They give Uma a tour and explain what everything is. Uma loves the tour, and they all sing a song about their neighborhood. — NickJr.com
Oobi and Kako flip through a book of neighborhood flash cards. They depict a library, a post office, and a zoo. This inspires Oobi to make a miniature version of his neighborhood out of cardboard boxes and paper. Oobi shows art supplies to Kako, who grasps the idea and agrees to help Oobi. They begin to move boxes around and put paper objects into place.
The next scene is an interview segment in which Grampu asks preschoolers about what they like to do in their neighborhoods. Afterwards, the boys' finished neighborhood model is shown. Uma walks by and sees Oobi and Kako's creation. The boys give Uma a tour of their neighborhood and explain the purpose of each building. First, they visit the library. Oobi and Kako explain to Uma that she must be quiet. Kako puts on a wig and a pair of glasses, pretending to be a librarian. Uma checks out a book with the boys' help.
Next, Uma pretends to send a letter at the post office. There, Kako acts as a postal worker. Finally, Uma visits the zoo and acts like different animals. Oobi dresses as an elephant and Kako dresses as a lion. Grampu sees the children playing and tells them how he loves what they have done. The four characters sing the Neighborhood Song as the episode ends.