Frosty

The lovely, humble Nastya is despised by her stepmother who favors her own mean-spirited and ugly daughter, Marfushka. Her meek father is powerless to stop his wife. After forcing Nastenka to knit socks before the rooster crows (with Nastya ultimately imploring the sun to go down again so she can have more time), Nastya's stepmother gives Nastya the tasks of feeding the chickens, watering the cattle, splitting wood, and sweeping the yard. Meanwhile, Ivan finishes his chores and heads out into the woods after receiving some final words of guidance from his mother, such as not forgetting his mother, not harming the weak, and honoring those who are old. To all these pieces of advice Ivan off-handedly replies "Don't worry" repeatedly. Read more on Wikipedia.