The category name pretty much speaks for itself.
Science fairs are a general term for what is usually an annual event at most American schools at which students present the results of some sort of research. Most students and their parents have difficulty figuring out what to do or how to do it. Information in this category should help with that, but it is not intended to provide shortcuts to do projects in the least amount of time (with the least effort) possible. There is simply no such thing as a high-quality, low-effort and low-substance research project.