Easy Riddles and Answers

Question: The person who buys me doesn't need me, the person who makes me doesn't want me, and the person who uses me can't appreciate me.

What am I?

Question: A man is twenty years old but has only had five birthdays. How is that possible?

Question: What has 4 fingers and a thumb, but is not living?

Question: When do you go at red, but stop at green?

Question: 100 feet in the air, yet its back is on the ground.

What is it?