For the past few years google has been running a contest for children K-12 to design the google doodle.

The topic-What I'd like to do someday...
Fly to the moon, be an inventor, a cupcake baker, a writer, an artist? What I'd like to do someday...
The winning doodle will be posted on May 20, 2011. There are age categories and prizes.

Parents may sign their children up.
Registration is due March 2, 2011 http://www.google.com/doodle4google/

For more contest information http://www.google.com/doodle4google/info.html
What I'd like to do someday...win the google doodle prize :)