The hook that would best grab the attention of 10 to 14-year-olds is: "What if I told you that you could make all of these places much more exciting with a simple piece of paper."
This hook is engaging because it promises an adventure and suggests that the reader can transform ordinary situations into fun experiences, which is likely to resonate with their interests and experiences. It invites curiosity and excitement about the possibilities of creating and flying paper airplanes, which makes it more relatable and enticing for the target audience.