Nose it all.
Your school website is a good website to find a science fair project. Science programs for kids typically have websites with projects listed. PBS has a website for kids that includes science projects.
google.com or science fair projects.com
Exercise makes you sweat
I doubt there is such a thing. Medicine is not, in general, a good subject for science fair projects; the studies take too long and mostly would be either illegal or at the very least unethical for most anyone who isn't already a physician to perform.
breast
Decomposition, energy, light, electricity, and photosynthesis are all good science fair topics
Light it up! Burning question - does color count?
A good and popular science project is nothing that yo ugly self can do !!
tomatoes and cucumbers