What Am I Riddles

Question: I am a child and a simpleton at once.
All are born with me,
But rarely am I possessed at death.

What am I?

Question: What has holes on each side, but can still can hold water?

Question: I am very easy to get into,but it is hard to get out of me.What am I?

Question: What has to be broken before you can use it?

Question: I have Eighty-eight keys but cannot open a single door?

What am I?