Science Fair - Innovation or Study?

Hi everyone, I'm a rising 9th grader interested in science fair!

I was just wondering for Science Fair, I see a lot of people making innovations or new devices with like all these fancy things (servos, motors). If this is an easier path to go, how do you come up with the idea and even get the resources to make and test such a device and actually get it to work - it seems difficult and quite challenging to engineer something.

On the other hand, I see less "studies" in science fairs, where for example, someone finds a new chemical and uses it to cure a certain ailment.

Another note: I see a lot of computer or coding based projects like Rishab's and wonder how they actually can be used to apply to science. Do you use data and then generate predictions or something else?

Thanks anyone for helping me!

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