Answer:
You throw me out when you use me and take me in when you are done. What am I?
I have three feet but I cannot walk. What am I?
There's a one-story house in which everything is green. Green walls green windows green doors. What color are the stairs?
I am an activity dogs are very good at when a ball is thrown.
I am an instrument you can hear but cannot touch or see. What am I?
What never gets any wetter no matter how hard it rains?