Good Riddles

Question: Light hides me and darkness kills me.

What am I?

Question: You can only keep it once you give it to somebody.

What is it?

Question: A man and a woman both carrying baskets with eggs inside passed each other on the sidewalk. The man told the woman, "If you give me one of your eggs I will have twice as many as you, but if I give you an egg you and I will have the same amount."

How many eggs were in each basket?

Question: 7 frogs are sitting on a log. 1 of them decides to jump off of the log. At this moment how many frogs are on the log?

Question: Sometimes I'm high and sometimes low,
and I creep between your toes.
My orders come from the sky,
I make men fall and rise.

What am I?