It looks like a lot more work than I'd like to put in for something like this, but if I had a kid interested in science I think this would be a cool project to work on together.
Be definitely cheaper to buy a fan lol But yeah, for kids who have an interest in science, this would be awesome to help them get started. It doesn't look overly complicated. & who knows they may win a Science Fair contest!
I agree, it would definitely be cheaper to buy a fan for sure but something like this would be great for a child who is into science and even for things like school projects.