Find Me, Will You

Find me. in da middle of the crowd Can you? cos i will be hiding like a pebble in the river bed like a shell by sea shore can u find me, among them thousands? i will be running like a wind, always on run. Can u catch me among them formless? i will be falling like a raindrop, in summer can u catch me, with them pouring? i will be flying like a swan, away away from you can u find me? Can u catch me? Can u keep me? Will u?