Answer:
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
Tall in the morning, short at noon, gone at night. But I'll be back soon.
There are 30 cows and 28 chickens. How many didn't?
Three little letters, a paradox to some. The worse that it is, the better it becomes.
What has 13 hearts but none beat?
What covers its face with its hands, speaks no language, yet most known what it's saying?