Russian Stories for Kids: The Story of King Frost & King Kojata

"King Kojata" is a Slavonic fairy tale. A king and a queen had no children. One day, the king was travelling and grew thirsty. He found a spring with a cup floating in it. He did not succeed at trying to grab the cup: it always evaded his hands. When he dropped to drink directly, a creature in the well grabbed his beard and would not free him until he promised to give it something he knew nothing about, and which he would find on his return home.

As for the story of "King Frost": a daughter-in-law is left to die by her father, because of the wickedness of his new wife. She meets the King of Frost, who makes her colder, and colder, to see whether she can sustain it...