Answer:
I am a mountain at night, meadow at day. What am I?
I don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
I am rubber you can eat!
I am the book one can never finish reading
I spend the day at the window go to the table for meals and hide at night.
Give it food and it will live, give it water and it will die.