Good Riddles

Question: A man drops an egg onto the cement. The egg doesn't break after falling 3 feet.

How could this be?

Question: A father's child. A mother's child. no one's son.

Who am I?

Question: You can rest on my pad without touching the keys.
I will sing all month long as long as you pay your fees.

What am I?

Question: What do you call a sad bird?

Question: I give you a family of three:

One is sits down, and will never get up.
The second eats as much as is given to him, yet is always hungry.
The third goes away and will never return.

What are they?