Become familiar with the logos of well-known brands. Match one logo image with its double to find out its name. The faster you become at pairing logos the better your ability will be in recognizing them in real world.
Play hangman - a captivating word guessing game. You can test your mastery with words from different categories. Just choose your favorite category and press start. Try different letters to discover the right answer while avoiding the more improbable ones.
Play a nice game of bubble breaking. Break bubbles before the time runs out. Don't break the red bubbles or you'll lose points. The bubbles move faster as the game advances so you'll need to concentrate better in order to win.