Answer:
A little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
What has six faces and twenty-one eyes?
What do you fill with empty hands?
I have rivers without water. Forests without trees. Mountains without rocks. Towns without houses.
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
I can only be played on a windy day