 
          invisible when you touched it. The riddle was “How many sides does a bubble have?” John thought
        
        
          it over but nothing came to him. Luke joked aloud,“ Hah it is 2, the inside and outside!” John
        
        
          pondered on what Luke said and suddenly exclaimed, “You are a genius Luke!” They typed the
        
        
          answer in on a keyboard. They entered the gate.
        
        
          The second gate was made of the strongest wood in the world and the riddle was, “What
        
        
          goes up and doesn’t come back down?” John and Luke thought so hard their brains almost burst.
        
        
          Luckily John typed in, “Your age,” as a guess. He never thought it would be right. The gate rose up
        
        
          slowly, creaking all the way.
        
        
          The third gate was made of poisonous mercury which slowly moved to surround you as you
        
        
          stood before it. The riddle was, “What belongs to you, but is used by others way more than you?”
        
        
          Luke immediately started talking, “ What do you think John? Have you got a clue John? Are you
        
        
          even listening John?
        
        
          “A person never calls himself his own name!” interrupted John. This time Luke typed it in just
        
        
          in time! The door slid open.
        
        
          The final door was made of tungsten, the strongest metal in the world. The last riddle was, “ It
        
        
          has been around for millions of years, but is not more than a month old.” It was the toughest they
        
        
          had come up against. They sat and pondered then Luke, the impatient one, announced that he
        
        
          gave up. “It’s too hard. We’ll never get it. How long have we been here?” Luke complained.
        
        
          All of a sudden John shouted, “The MOON!” He typed it in lightning speed. Instantly the door
        
        
          opened and as they stepped in they were greeted by the foul breath of Yan Long. Meanwhile their
        
        
          parents were tied up and looking terrified. Yan Long whipped around them all in a frenzy, forming
        
        
          a ring of fire. They were trapped: there was no way out! Inside the ring they all faced the dragon.
        
        
          “Quickly, we’ll use the dragon-fruit to lure him into the time machine, and we’ll send him back to
        
        
          the beginning of time,” shouted the twins in unison. Yan Long was driven crazy for the fruit and
        
        
          dashed towards the time machine. Together, Luke and John shoved Yan Long in, and sent him back
        
        
          in time. Now how could they get out safely? At that moment, Ren Song appeared in a teleporter-
        
        
          they were saved! The whole family jumped in, and on the way John also grabbed a piece of Dragon
        
        
          Fruit: the fruit only dragons ate and could find. They went straight to the competition, everyone
        
        
          rejoiced to see their parents had been rescued, and the twins presented the dragon fruit as their
        
        
          proof of their brave quest to save their parents and defeat the legendary Yan Long.