Kids Riddles

Question: I am a small room,
but no life lives inside,
no matter what weather looms,
very cold my residents reside.
What am I?

Question: The more you take, the more you leave behind.
What are they?

Question: A man leaves his cabin and travels 100 meter north, 100 meters west, and 100 meters south just to arrive back at his home. He sees a bird. What kind of bird is it?

Question: A man and his son are in a terrible accident and are rushed to the hospital in critical care. The doctor looks at the boy and exclaims "I can't operate on this boy, he's my son!" How could this be?

Question: You struggle to regain me.
When I'm lost, you struggle to obtain me.
I pass no matter your will,
but I'm your slave to kill.
What am I?