It's Halloween, and as is customary on this date, Google has treated us with another interactive Doodle.
The Doodle lets you mix four ingredients into a witches' brew; depending on the order you choose, you'll get a different mini-game to play.

Google's Halloween doodles have always been among the most interesting; last year, it was an interactive haunted house, and the one in 2011 showed a time-lapse video of Googlers carving out giant pumpkins.
How do you like this year's Halloween doodle? Share your thoughts in the comments!
Image: Flickr, chispita_666
Each package gets larger with a mouse-over, and a click on it returns search results pertinent to a specific country or the particular items featured in a scene. This one is from December 24, 2010.
The Google Doodle team stars in an homage to the silent film era's greatest star's 122nd birthday, April 15, 2011.
This one's done in HTML5 and was published Sept. 7, 2010. To get the full effect, here's one you can interact with.
This Doodle commemorated John Lennon's 70th birthday in October 2010.
Debuting May 10, 2011, this Google Doodle marks dance choreographer Martha Graham's birthday.
Commemorated the birthday of the inventor of the Bunsen burner, German chemist Robert Bunsen on March 31, 2011.
The great inventor's birthday was honored on February 11, 2011.
Marking Independence Day 2010.
A real crowd pleaser was this playable Pac-Man game, which appeared on May 21. 2010. Here's a playable version.