Answer:
I'm blue, but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt, but I'm good for you. What am I?
I am the book one can never finish reading
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
What happens when you throw a green stone into the Red Sea?
I get thrown in the air and will fall down. I get thrown down and I will rise in the air. What am I?
I am a rock group with four members. All dead one was assassinated.