"Uma's Birthday!" is an episode of Oobi from the first season.
A big surprise birthday party for Uma becomes more about the party and less about Uma. Uma becomes a little overwhelmed and Grampu, Oobi, and Kako realize that Uma would prefer a small party. They adjust their plans accordingly. — ABC Television
Oobi and Kako are hiding under the table in an attempt to surprise Uma, as today is her birthday. They hear a knock on the door, expecting Uma to appear. However, Grampu shows up instead and tells them that he purchased supplies to make Uma's birthday cake. Several seconds later, Uma walks in and surprises the boys. The next scene shows Uma opening her presents in the living room. Grampu gives her a large present and Kako gives her a larger one. Oobi walks in with a gigantic present, which ends up being an oversized plush bear.
Later on, Oobi teaches Uma how to play the party game "Pin the Tail on the Donkey." Oobi gives her a fake tail and a blindfold, instructing her to place the tail on a picture of a donkey without looking at it. Uma accidentally goes the wrong way and walks to the kitchen, where she falls into Grampu's unfinished cake. Shocked, Grampu asks if the cake tastes good. Uma explains that it is "delicious."
Oobi, Kako, and Grampu enter the living room to sing "Happy Birthday" to Uma. While they sing, Uma tries to tell them something. However, the boys are having so much fun that they do not notice her. Oobi realizes that she has left and searches for her. He finds Uma in her room, where she looks depressed. Uma tells him that the party was becoming more about the activities and less about her. Oobi suggests that they throw a smaller party, which Uma would prefer. Kako and Grampu walk in, singing "Happy Birthday" in a softer tone. Kako presents Uma with a gift, which is revealed to be a smaller teddy bear. Grampu brings in a birthday cupcake and Uma blows out the candle. Uma proclaims that this is the best birthday she has had yet.
Later, Uma spots slices of Grampu's cake on the table and decides to play a counting game with Kako. Uma tells Kako that whenever she counts the slices, Kako will eat one. Kako is excited but ends up eating too much cake. Uma wants to count bowls of ice cream next. Kako is so full that he faints upon hearing this. In the next scene, Oobi asks the viewers if they have ever had a birthday party. Several preschoolers are shown talking about their birthday experiences. Oobi explains that birthdays are all about friends and family as the episode ends.