Frozen Fever

On Anna's birthday, Elsa and Kristoff are determined to give her the best celebration ever, but Elsa's icy powers may put more than just the party at risk. Queen Elsa is determined to give her younger sister, Anna, a perfect surprise birthday party, enlisting the help of Kristoff, Sven, and Olaf. However, Elsa starts developing symptoms of a cold, unknowingly producing "Snowgies", little snow-babies who begin to dismantle the birthday party's decorations. In the end, they learn that taking care of her beloved big sister is the best birthday present she could have been given.