The Bells of a Spotted Turtle (1990)

The little boy lived happily with his grandmother. But the parents get divorced and the daughter-in-law takes her son away. The time has come for the grandmother and the son to part with each other, and while making a new coat for the son and tying a bell of a spotted frog to his shoe, he wishes, "Mom and father, go peacefully." If the little boy rings the bell in his imagination, he thinks that his grandmother will hear him and come. But the mother, who thinks she can forget her past life, shows how far she is from the depth of her son's innocent yet righteous heart.