"Soup!" is one of the Oobi shorts.
Oobi, Uma, and Kako are in the kitchen, all huddled around a bowl of soup for Uma. Oobi and Kako sniff the air and think it smells delicious. The boys slide the bowl over to Uma, and they give her a taste of it from a ladle. She says that it's too hot. Kako blows on it to make it cool down. Uma tries another sip from the ladle, and now she says that it's too cold. After waiting a while, the soup is just the right temperature.
A video of the entire short has been found, but since it was taken from a low-quality recording of a Noggin tape being skipped through, it's shaky and has no audio. (It can be watched here)