yuito yoneyama is in his first year of junior high school in tokyo. yoneyama presented a card game he invented four years ago when he was just 9 years old. the game, called chemistry quest, features cards that each shows the symbol for a chemical element. the aim is to collect cards to form molecular bonds. the player who collects the most cards is the winner. >> you have to make a molecule with two cards. >> reporter: during the festival, yoneyama introduced his card game to local children. the young players quickly grasped the rules and set to work collecting as many cards as possible to create complex molecules. >> very fun. >> translator: at school we have to study, but this game teaches us chemistry in a fun way. >> reporter: another special guest at the festival was derek low. he is a college student from singapore who is now studying computer science in california. low made a name for himself after he posted a video online demonstrating an application he developed for his smartphone. using voice commands, he can adjust the lights and curtains,