“The Doodle Monsters” allows the user to create their own monsters to take part in a virtual duel. To play, the user draws a monster character on a special card and sets it on a spell book. For the monster to appear on screen, the player has to summon the character by yelling through a built-in microphone. Once the duel commences, players fight each other by controlling their characters through voice command and by placing their hands over the book.