During those old days, playing at the green field was the happiest time for kids. There are grass fields in most housing estates and it's usually groups of children having their fun time at the field in the evening. Most were playing football, badminton, kite-flying and so on. However, with the regressive social security and popularization of video games, trace of children on the grass field has vanished. Whoops of delight is no longer heard from the lonely field nowadays.