So what interests you? Before we pick a specific science fair idea, we should investigate the branches of science that you find most interesting. Let's look at a list of a few general scientific fields:

Anatomy
Astronomy
Biology
Botany
Chemistry
Geology
Mathematics
Microbiology
Natural History
Physics
Physiology
Zoology

Wow! Quite a few to choose from--and remember that each of these general fields has many, many sub-categories, so the list of science fair ideas you can investigate is virtually endless.

So how do you go about choosing a science fair project idea? Well, one way might be to decide which subject you are best at in school. Do you like math? Then you might be interested in a science fair idea involving early computers, calculating machines, geometry, algebra, or even computer software. What about gym or health class? Then maybe you would be interested in anatomy, which is the study of the human body. If you've ever used a microscope in a science class, then you could try a science fair project idea in microbiology, which is the study of tiny organisms, like bacteria and amoebas.

If none of the subjects in school interest you enough to do a science fair project on them, then think about what you like to do outside of school. Maybe you like the outdoors and the environment. In that case, try botany, which is the study of plants, or geology, which is the study of rocks and minerals, or nature conservation. Or maybe you have a telescope at home and like to look at planets and stars. In that case, astronomy would be a great science fair idea. There are many great books with more science fair project ideas that may help you choose a topic. Click here to see what's available.

Whatever science fair project idea you choose, it's important that it's something you are interested in and enjoy. After all, the science fair project isn't just about getting a good grade in school, it's about learning and having fun!