Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

1000 Science Fair Project Ideas by Subject

Looking for a science fair project idea? Each of our science fair project idea has complete instructions with video. Get ideas for your science projects, find extra resources for your class' scientific projects, or try a fun experiment at home! It doesn't matter what grade you're in, there's something for everyone!

You can find your perfect science fair project from the different science subjects below or from our science fair project idea lists!

Chemistry Science Fair Projects

Chemistry Science Fair Projects

Chemistry is the study of matter, which is everything around us!
Microbiology Science Fair Projects

Microbiology Science Fair Projects

Microbiology is the study of tiny living things that we can't see with our eyes, like bacteria, viruses and fungi.
Medicine & Health Science Fair Projects

Medicine & Health Science Fair Projects

Medicine and health are about understanding how our bodies work and how we can keep healthy.
Math & Computer Science Science Fair Projects

Math & Computer Science Science Fair Projects

Math is all about numbers, patterns, and solving problems. Computer science is about using math and technology to create computer programs and solve real-world problems.
Earth Science Science Fair Projects

Earth Science Science Fair Projects

Earth science explores our planet from the solid ground to the vast oceans and the air we breathe.
Behavioral Science Science Fair Projects

Behavioral Science Science Fair Projects

Human behavioral science studies what makes us human: our thoughts, emotions, and actions.
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Science Fair Project Idea Lists

Looking for other ways to find good ideas for science fair projects? Check out these lists of science projects!

Easy Science Fair Projects

Explore the exciting world of science with an easy science fair project that you can do at home using simple materials. Any one of these easy project ideas will teach you important scientific concepts and help you have fun while learning. An easy science fair project is a great way to introduce the wonders of science to kids and adults alike!

  • Changing the Color of Flowers

  • Baking Soda Volcano

  • Swimming Raisins

  • Egg in Vinegar

  • Color of Skittles Experiment

  • Jumping Rice Krispies

  • Mixing Colors of Light

  • Camouflage and Hide

  • Light and Dark on Seed Germination

  • Make a Parachute

More science project details at Easy Science Fair Projects

The Top 10 Best Science Fair Projects

To find the best science fair project for you, we've picked the best science projects from 10 different science categories, all with very interesting topics. If you're looking for more science projects at another difficulty level or topic, you can explore science fair project ideas by grade level at the top of this page!

  • Jet Lag in Hamsters (circadian rhythm, Biology science fair project)

  • Egg with Vinegar (acid-base reaction, Chemistry science fair project)

  • Galileo's Inclined Plane Experiment (acceleration, Physics science fair project)

  • Plant's Favorite Color for Photosynthesis (Photosynthesis, Botany science fair project)

  • Color and Taste (color perception, Psychology science fair project)

  • Does Dog Saliva Kill Bacteria? (antibacterial, Microbiology science fair project)

  • Decomposing Plastic Spoons (biodegradable materials, Environmental Science science fair project)

  • Super Hero Egg Shells (structural engineering, Engineering science fair project)

  • Music Math: Playing Notes with Equations (music, Math science fair project)

  • Temperature's Effect on Seawater (climate change, Earth Science science fair project)

More science project details at Best Science Fair Projects

Cool Science Fair Projects

Get ready to be amazed by super cool science projects that you can do right at home! With just a few simple things, you can be fascinated by science and have tons of fun with these popular science projects!

  • Explosive Elephant Toothpaste

  • Egg in Vinegar

  • Electrifying Lemon Battery

  • Making Oobleck: Liquid or Solid?

  • Egg Drop Project

  • Colors of Skittles Experiment

  • Cloud in a Bottle

  • Baking Soda Volcano

  • Egg in a Bottle

  • Plastic Milk

Project details and more cool science projects at Popular Science Fair Projects

One-Day Science Fair Project Ideas

Quick experiments can be a great option for a science fair project. In this list, we've highlighted one-day science fair project ideas for elementary school (easy), middle school (medium), or high school (hard). These experiments are fast and easy to do, but the science topic packs a punch!

Acid-base reactions: Mixing acids with bases quickly makes carbon dioxide gas!

Chromatography reactions: Separating out colors as liquid moves through the paper!

Heat reactions: Heat speeds things up!

Project details at Quick Science Fair Projects →

Testable Questions for Science Projects

A testable question is a question that we can answer through a science experiment. To do this, we do a control experiment, then we change one thing in the experiment to see how it affects what happens. This is how we can discover the answer to our question!

  • What makes a cloud form?

  • Can drink and food taste different just by changing its color?

  • Does the color of light affect photosynthesis?

  • Does temperature affect seed sprouting?

  • What makes popcorn pop?

More testable questions with their science projects

Science Fair Project FAQ

What are some hands-on ways to find inspiration for my science fair project?

Science museums

Science museums are great places to explore if you're looking for inspiration for your next science fair project or just want to learn more about science. Science museums, natural history museums, space museums, and discovery museums are all great places to do that! You can discover all sorts of interesting things about science and find cool project ideas for science fairs.

There may be free admission days or free passes to a science museum near you! Check your credit card for offers, your local library for free museum passes, and nearby science museums for free entrance days.

So what are you waiting for? Find a science museum near you and prepare to be awed by all that you can learn there!

Look around and observe

Do you know how scientists start their cool projects? They often look around and notice things that are interesting or make them curious. Then they start doing an experiment! You can do the same! Look around your school, home, or community. Is there anything that catches your attention and makes you curious? Maybe you notice something interesting or a problem that people are facing. This could be a great starting point for your science fair project!

Try an Easy Science Project!

These science projects are easy and fun to do. You may discover a simple experiment that sparks your interest and inspires you to do more experiments, turning it into a science fair project! Check them out at Easy Science Fair Projects

How do I start a science fair project?

No matter if you're in high school, elementary or middle school, science fair projects are a fun and unique way to discover science by asking a question and doing a science project. We'll help you find a science fair project idea and guide you through the process of doing and presenting your science fair project with Science Fair Coach's Science Fair Project Guide.

What should I do after I have a science fair project idea?

If you have a science fair project idea, Science Fair Coach can help you turn it into a full science fair project! Starting at the Introduction to Science Fairs, check out the section on How to do a science fair project for a step-by-step guide!

We'll guide you through every step of the scientific method, from designing and conducting your experiment to collecting and analyzing your findings.

If you're working on an engineering project, you can head over to The Guide to the Engineering Design Process.

Finally, we'll help you showcase your results on a science fair board for others to learn from and enjoy.

How do I make a science fair board?

Your science fair board is where you show off your science fair project for everyone to see and learn from. With Science Fair Coach's step-by-step guide, you can make sure your science fair board stands out and impresses at the science fair!

Where can I find a science fair competition?

Science fair competitions are an excellent opportunity to explore science. One of the of the premier science advocacy organizations, the Society for Science, is associated with more than 400 science fair competitions in almost every US state, as well as over 70 other countries, regions, and territories. You can find out if there's a Society of Science affiliated science fair near you!

The The www Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!