Hi,
The experiment description you provided a link to could make a good project in my opinion, but really I am not the one whose opinion should count. You are the one who must do the work and be happy with the experience, so you are in the best position to judge how good the idea is. To help you make this judgement you probably should read through the Science Buddies Project Guide:
https://www.sciencebuddies.org/science- ... l?From=Tab
Pay particular attention to the section on “Your Question”:
https://www.sciencebuddies.org/science- ... tion.shtml
If you read all the way through this page there are some checklists to help you determine how good an idea you have for a project. A great project is one you are really excited about doing. A truly exceptional project is like going into a really good candy store for the first time that has lots of candy types you have never seen before and being offered free samples of anything you want try. You kind of rush around finding more and more things that fascinate you and that you had never dreamed existed or were related, then if you are lucky you have an aha! moment when you realize “That’s why that happens!”. It can be a really wonderful and exciting mountain top experience.
I wish you every success.
Best regards,
Barrett L Tomlinson