Why are science fairs important? What makes the science fair process valuable? It’s an excellent question and a good way to start a class discussion about this time-honored tradition. First and foremost, why DO we ask our students to work on a science fair project year after year? The answer, in a nutshell, is to help them learn how to think like scientists. Scientists find answers to questions that interest them. In other words, your students simply need to ask themselves, What do I want to know more about?