Easy Riddles and Answers

Question: What goes in the water black and comes out red?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: What do you call a sad bird?

Question: What asks but never answers?

Question: I have 6 faces and 21 eyes, but can't see a thing. What am I?