Voting is open for the UK's edition of the Doodle 4 Google competition. Google has run this competition in both the US and UK for four years now.
This years competition:
We're asking young people aged 5–16 from across the UK to design their own doodle. This year's theme is 'My Hero'. We'd love to see the figures young people look up to represented in their doodles, whether family, friends, people in the community, or world figures. We're interested in the people considered heroes for the 21st century and how entrants represent them using images.
To vote, go to this page. You can vote for each of the four brackets, 5-7 years old, 7-11 years old, 11-14 years old and 14-16 years olds.
Forum discussion at Google Webmaster Help.