What Am I Riddles

Question: You put me in hard.
But then I become soft.
Blow me hard and I will get bigger.

What am I?

Question: The shorter I am, the bigger I am.

What am I?

Question: What always goes to bed with its shoes on?

Question: There are several different kinds, but the one you pick doesn't do its job.

What is it?

Question: If you throw me out of the window,
I'll leave a grieving wife.
Bring me back, but through a door,
You'll see someone giving life.

What am I?