Looks like Google just added the following to their robots.txt file:

User-agent: Kids
Disallow: /tricks
Allow: /treats

http://www.google.com/robots.txt

Oh, and neither of those pages exists :)

Ah ah, I like people who did this :)

That's funny，Google is playing with himself？

Happy Halloween everyone... :D

lol heres a bunch more easter eggs http://blog.cartercole.com/2009/09/google-easter-eggs-yea-i-stole-it-from.html

haha!
happy halloween. :)

Happy Halloween Every one

I guess we just expect this from Google now.

Anyone seen this on other search engines?

Nope, though WebmasterWorld had something similar.