[Look at the little scientist, doing his science! That's adorable.]

None of the above. Good guess, though. I know a lotta spirits who could fit those bills.

[And since there's no real point in being too vague and mysterious -]

Try 'ascended mortal.' That's closer to the mark.

[And then the kid has to go bringing religion into the question, and man, Bunny just hopes he's not messing with some mortal's faith too much with all this. They take that so seriously.]

That one's on you mortals. I used to give the eggs and candy closer to the equinox, but now I'm expected at Easter. The way you teach your myths to your kids don't change us, but we pay attention. As for the eggs and candy - They make good gifts around springtime. I happen to know how to grow eggs out of flowers, and paint 'em up beautiful. I also happen to make just about the best candy you've ever had. Come the end of winter, when mortals start needing hope, what's a better gift than something beautiful you can eat?

There's your answers. Were they scientific enough, or do y'need me to sketch a microscopy of an egg-growing flower cell to go with it?

[If he can talk to a kid in science terms - there's no way he's going to skip that opportunity.]