The mood of the class suddenly changed. It be became noisy,as the students got up and went to talk to their friends. With the papers that were left over,they made planes and threw those at each other. some made little missiles with the paper and shot them through straw. Natasha too had fun. After a while , Natasha picked up her bag and turned to step out of the class. she saw that all the students were now picking up the paper missiles and planes and putting them into the bin. Natasha could not believe it. "Come,Natasha. We can't leave the class looking like this. This our school and it is our duty to keep it clean and tidy just like we do at home. "When the students left the room, everything was perfect. The board was wiped clean and the board-wiper dusted and put back in its place.