Answer:
What force and strength cannot get through. I, with a gentle touch, can do. Many in the street would stand. Were I not a friend at hand.
The more of it there is, the less you see.
Who works when he plays and plays when he works?
In the night a mountain, in the morning a meadow.
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
I can only be played on a windy day
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?