Answer:
When the creeper passes, all the grass kneels
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
What can be seen but never found that only hides in the unwound?
We travel much, yet prisoners are, and close confined to boot. Yet with any horse, we will keep the pace, and will always go on foot.
It's been around for millions of years, but is never more than a month old. What is it?
I can only be played on a windy day
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?