I want to participate in ISEF?

I am in class IX and I want to take part in that fair. But my target is simply diffused and hence, I do not know how to begin with. I am a lover of science but can you plz give me certain ideas, realting to physics, chemisty, maths or technology, it can be any, but I really need a plan to begin with. You need not... show more I am in class IX and I want to take part in that fair. But my target is simply diffused and hence, I do not know how to begin with. I am a lover of science but can you plz give me certain ideas, realting to physics, chemisty, maths or technology, it can be any, but I really need a plan to begin with. You need not have to tell me all I have to do, coz I will have to find that out. Just give me a hint about what to begin with. Like, what has not been discovered or invented yet, something like that.
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