On the Google home pages today you will see a new interactive logo for Valentine's Day. The logo let's you make your own box of chocolates that you can share on Google+, Facebook, Twitter or via a URL with your friends and family.
Here is a video of how the interactive logo works:
The neat part, you can send someone the chocolates and it takes you to the Google home page and unboxes it for you. Here are mind to you by clicking here.
Update: Google.com in the US has a completely different Doodle than all the other Google home pages. Try it out at Google.com and here is a static picture:
Forum discussion at Google+.