Burden 1983 on netflix

After the death of her mother, little Olya lives alone with her father. One evening, a girl hears her father inviting his beloved girl Sveta to stay with them forever. But she offers to send the girl to a 24-hour kindergarten so that she does not become a burden for them. Olya asks the teacher Varya what this word means? Olya is very attached to her teacher and she would like to see her as a new mother.