the child ghost mystery

there's an aparment diagonally opposite ours and a stone's throw away... a family put up a swing on their balacony - a tear-drop shaped, one-seater cane swing. each day a small boy would be seen swinging on it.. all day long. whenever bobo and i stepped into our balcony and looked their way, we would see the little boy playing in the swing. early morning.. mid afternoon.. any random time in the evening... the boy would be swinging.. nonchalantly.. hour after hour.. day after day

as we began to notice how the boy never stopped swinging.. bobo and i were greatly spooked. clueless on how a small boy could tirelessly swing all day long, we talked about the possibility of the boy being a ghost.. one that was visible only to us.. nothing else could explain the non-stop swinging  

until one day.. i stepped into our balcony and looked in their direction.. and saw two identical boys.. dressed identically.. switching places on the swing.. the one who got off went into the house.. there had been twin boys taking turns on the swing!