A bright greenish type of bubble of light landed on the merry-go-round in our primary school playground.

My brother and I were playing ouside in our primary school playground. Nobody was around at that time when suddenly we saw a water melon shape and slightly greenish kind of light with longtitudnal stripes land onto the merry-go-round about 10 yards away from us. We immediately ran towards it and just as I tried to hold it in my arms it flew away on top of a building nearby. It stayed there for a while moving left to right and right to left. I have never seen anything fly with such a speed that one could lose it with the blink of an eye. It's diameter matched that of the merry-go-round.