JB is my 4-year old.
ME: I spy with my little eye, something beginning with “f”.
JB: Fish!
ME: Fish does begin with “f”, but that isn’t it.
JB: Er…
ME: Something else beginning with “f”.
JB: Fish!
ME: No, it’s not fish, JB. What else can you see that begins with “f”?
JB: Fish!
ME: You’ve already said that!
JB: No, no, no, no, no Daddy! This is a different kind of fish. The other fish was the kind you get in the sea. This is fish for eating, Daddy.
All Wrong 
The boy is clearly one step ahead of you Daddy 😉