Can you give me a prize winning science fair topic thats high school level?
I’ve judged a few science fairs, and I can tell you right now it’s not the project that wins – it’s the student. I’ve seen many students present very impressive projects and then completely fail to explain what they did or the science behind it (especially problematic with anything involving electricity). They just didn’t understand it. Pick something fairly simple and then do a really good job with it.