Answer:
What an fill a room but takes up no space?
You throw me out when you want to use me and you take me in when you don't want to use me. Who am I?
Hard to catch, easy to hold. Can't be seen, unless it's cold.
What month of the year has 28 days?
We are five little objects of an everyday sort. You will find us all in a tennis court.
What did the piece of wood say when he saw the screwdriver and screws approaching?