Answer:
I have roots that no one sees and I am taller than trees. Up, up I go, but never do I grow. What am I?
I go into the water black and come out red. What am I?
I am round. I have only one line. Circle is not my name indeed. What am I?
My days are numbered.
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 am I?
No matter how little or how much you use me, you change me every month.