That reminds me of a famous conversational sequence about the complete uselessness of overt language correction in young children:
Father: You mean, you want the other spoon.
Child: Yes, I want other one spoon, please Daddy.
Father: Can you say "the other spoon."
Father: Say "other."
Father: "Other spoon."
(from "When do people learn languages?", although it's been cited in many, many other places)
Also, a long line of research has found that parents tend to correct their children's utterances based on their truth value and not so much based on their grammar.