WHAT is the name of the fifth kid

I love her... She is a bit dense and slow to catch on... and her perpetually fucking it up after getting it right...

Abbott: You throw the ball to first base.
Costello: Then who gets it?
Abbott: Naturally.
Costello: Naturally.
Abbott: Now you've got it.
Costello: I throw the ball to Naturally.
Abbott: You don't! You throw it to Who!
Costello: Naturally.
Abbott: Well, that's it—say it that way.
Costello: That's what I said.
Abbott: You did not.
Costello: I said I throw the ball to Naturally.
Abbott: You don't! You throw it to Who!
Costello: Naturally.
Costello: Now I throw the ball to first base, whoever it is drops the ball, so the guy runs to second. Who picks up the ball and throws it to What. What throws it to I Don't Know. I Don't Know throws it back to Tomorrow—a triple play.
Abbott: Yeah, it could be.
Costello: Another guy gets up and it's a long fly ball to Because. Why? I don't know. He's on third, and I don't give a darn!
Abbott: What was that?
Costello: I said, I DON'T GIVE A DARN!
Abbott: Oh, that's our shortstop!

This reminds me of the old Abbott & Costello Comedy Routine "Whos On First?"

Watt is the name of 5th kid.