If a child were to casually ask their teacher, "do you have [some object]," which would they say?
先生、「何か」はあるの？ (Sensei, [nanika] ha aru no?)
先生、「何か」があるの？ (Sensei, [nanika] ga aru no?)
I think I've heard a child say the second on one occasion, but a friend of mine says the first is correct. Which is it? What's the difference?