In “Frozen Fever,” it is Anna’s birthday and Elsa and Kristoff are determined to give her the best celebration ever, but when Elsa catches a cold, her powers may put more than just the party at risk. After some near-misses, a very exhausted Elsa finally makes it with Anna to the courtyard where the party has been arranged. It is a big hit, and at last Anna manages to convince Elsa into letting her to lead her to bed and take care of her. Meanwhile, Olaf has taken the tiny snow creatures under his wing and takes them to Elsa’;s ice castle with the help of Kristoff.