The best hook to grab the attention of 10 to 14-year-olds for an informative text about how to make a paper airplane is:
"Math class. The dinner table. Your little brother’s T-ball game. What if I told you that you could make all of these places much more exciting with a simple piece of paper?"
This option engages the audience by relating to their everyday experiences and promising an exciting activity that can be done in those contexts.