Google shortlisted 40 Regional finalists for Doodle 4 Google. They are under 4 grade groups. You can see few samples below.
Now you can go to the Shortlisted page here and vote for the doodle you like (One on each grade group). Voting is open from May 18, 2010 6:00 a.m. Pacific Time (PT) to May 25, 2010 5:00 p.m. Pacific Time (PT). On may 26th Google will announce the finalists and Winners of this competition. The winner's doodle will be displayed on Google on May 27, 2010.