If you have Google.com as your browser homepage, you may see that the Google logo changes occasionally. These are called Google Doodles, and help celebrate holidays and birthdays of famous artists, inventors, and historical figures. Doodles have been around since 1998, and now Google has a team of illustrators that have done over 5000 doodles over the years. Some of the Doodles are interactive and have simple games that you can play. They can be a nice way to learn something new - my recent favorite was on the history of Bubble Tea!
