Optical illusions are captivating and can trick our eyes into perceiving something that isn't real. Optical illusion puzzles, which rely on factors like light and our brain's processing, are a fun and stimulating activity. A riddle posted on an Instagram page by 'Optical Illusions' challenges users to think outside the box and guess what doesn't have wings but can fly. Answers range from 'kite' to 'dream' and 'rumor'. What do you think the correct answer is?