It's always fun to observe children exploring their world. Have nothing to worry about, spending most of the time playing. Children will seek opportunities to play, either playing with friends or by themself.
This photo was taken in January this year. Getting bored while waiting for his sister to recieve her medal, my son spent his time exploring the school's compound (of course I had to monitor him) and playing by himself and sometimes urged me to play with him. In one occasion, he played 'hiding', but hiding behind a steel pole. Thus I took this shot.
It's funny, how naive they are.... :)