Answer:
I hide but my head is outside.
I have one eye. See near and far. I hold the moments you treasure and the things that make you weep.
To cross the water I'm the way, for water I'm above. I touch it not and, truth to say, I neither swim nor move.
At first I am a yellow weed in the lawn, and then the wind blows, and my white feathers are gone. What am I?
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
I can only be played on a windy day