His sarcasm is developing nicely.

KIDZOOKIE:  I got a hundred on two tests in a row.

TACO:  Kick ass.  I'm proud of you; you're really smart.  What tests?

KIDZOOKIE:  Science and math.

TACO:  Okay, so you're studying fractions in math.  What was the science test on?

KIDZOOKIE:  Planets and stuff.

TACO:  Astronomy is awesome.

KIDZOOKIE:  Not like all of them though, just the sun, the moon, and the stars.

TACO:  Cool, what did you study about them?

KIDZOOKIE:  Like how they light themselves.

TACO:  Well, the sun lights itself.

KIDZOOKIE:  But the moon doesn't, I know.  The stars do, though.

TACO:  What are stars made of?

KIDZOOKIE:  Gases.

TACO:  That have turned into?

KIDZOOKIE:  Stars.

TACO:  Touche.