Ten years ago, when Sergey Brin and Larry Page founded Google at Stanford, they were puzzling over choosing a suitable Logo, so they found their friend Ruth Kedar. Kedar designed the famous Google Logo for them (refer to the story of the birth of Google Logo). In the following nearly 10 years, every festival or important day, Google always plays around with its original logo to launch various interesting variations, which they call Google Doodle.