What Am I Riddles

Question: Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not.

What is it?

Question: I'm tall when I'm young and I'm short when I'm old.What am I?

Question: There is an ancient invention still used in some parts of the world today that allows people to see through walls.What is it?

Question: Countless blades that bend with a touch,
exploited by kids who want to make a buck.

What am I?

Question: To give me to someone I don't belong to is cowardly, but to take me is noble.
I can be a game, but there are no winners.

What am I?