Google regularly marks special occasions and celebrations with custom logos, or doodles as it calls them, on the homepage. Right now it's marking the 172nd birthday of 19th century French painter Paul Cézanne. Each year, Google also encourages kids to tap into their artistic side and create a doodle to be displayed on the homepage for millions to see.

It's the fourth year Google has held the competition and this time around the theme is one that should appeal to everyone and is especially important for the ones participating "What I’d like to do someday...".

"Doodle 4 Google is an opportunity of a lifetime: design the Google.com homepage doodle for millions to see, and while you’re at it, take home a $15,000 scholarship and a $25,000 technology grant for your school," Marissa Mayer, VP, Consumer Products at Google announced.

"In the spirit of thinking big, our theme this year is 'What I’d like to do someday...' — giving all of the talented young dreamers an opportunity to flex their creative muscles. We know this crop of students will be the generation of tomorrow’s leaders and inventors, and we can’t wait to see what they come up with," she added.

Google is making some changes from the previous competitions to make it easier for students to register. Until now, registration came through schools and each had a limit to the number of entries they could send.

Now students can have their parents or guardians send in the registrations. Schools can also send as many doodles as they want, though students are still limited to one entry. Students have to register by March 2nd and all entries have to be submitted by March 16.

Last year's winner was third-grader Makenzie Melton which won with the entry "Rainforest habitat." The theme was similar to this year's, "If Could Do Anything, I Would...". The winning entry will be displayed on the Google homepage on May 20.