You can vote by clicking here and selecting your favorite Google Doodles from each grade group. There were about 400 state finalists with 40 regional winners. You vote for the regional winners within the four grade groups, including grades K-3, 4-6, 7-9, 10-12.
You can vote until May 18 at midnight Pacific time. On May 20th, the winner will be announced and that logo will appear on the Google home page on May 21st. The logos will be on display at the Smithsonian’s Cooper-Hewitt, National Design Museum, during May 21 – July 5, 2009.
You can see last year winners here.