The hook that would best grab the reader's attention is: "Lift. Gravity. Force. What if I told you that you could teach all of these concepts to your students with a single piece of paper?"
This opening is engaging because it introduces intriguing concepts that many readers in the 10 to 14 age range might find interesting and relatable. It also ignites curiosity about how something as simple as a paper airplane can be a tool for understanding important scientific principles.