Avatar: The Last Airbender (2005)

S1E9 The Waterbending Scroll

Katara tries to teach Aang the art of waterbending, only to find that he picks it up much quicker than she does. Frustrated with her own skills, she seeks a way to enhance her abilities. While exploring a pirate's shop, she discovers a waterbending scroll that could boost her training. Knowing she can't afford it, Katara makes the impulsive decision to steal the scroll, hoping it will help her catch up.