Below are a few helpful websites that you can browse for science fair project ideas.
Science Buddies (http://www.sciencebuddies.org)
Free Science Fair project ideas, answers, and tools for serious students.
You can turn the investigations that you see on DragonflyTV into your own science fair project!
Agricultural Ideas for Science Fair Projects
A few basic ideas of agricultural science projects you can do.
You can also search Sociology Experiments, too. The sciences of human behavior!
“Science Fair Projects” Search