Another activity in this week's game is really easy.
All the student has to do to get the points for his team is make a grammatically correct sentence using one of a group of very common words.
The word in question was "little".
He pointed at his friend and said "My friend has a little brother."
Unfortunately for him I know that "little brother" in Chinese is a slang term for "penis", so I understood exactly why the class was laughing. His face was a picture when I told him that I understood, though his friend's face seemed to indicate that they would be having words after the lesson.