Who's on first?

We have really been working with Stacey on her alphabet in anticipation of her starting pre-school in the fall.

For the past couple of days she has been asking what does _____ start with? She was doing this earlier today and our conversation went like this:

S: What does bunny start with?
M: B
S: Oh just like baby!
M: Yup
S: What does why start with?
M: W. W-H-Y spells why.
S: OK
M: What starts with W.
S: I don't know.
M: No the word what starts with W. Just like when you asked me what bunny starts with, the word what starts with w.
S: But I don't know what starts with w.

It really felt like the who's on first conversation!!!