It starts with curiosity. Why does something act the way it does? What would happen if…?
Such questions form the basis of scientific inquiry, and you probably ask them all the time! A science fair project provides the opportunity for you to act on your questions and discover answers. As you formulate a question, develop a hypothesis, design an experiment, and analyze the results, you’ll gain valuable critical thinking skills. As you design a presentation and interact with judges, you’ll grow in confidence and public speaking ability. Not sure where to start?

Find popular science projects, ideas, and supplies below! Home Science Tools has partnered with Science Buddies to bring you the best science fair kits!


View Chemistry Science Fair ideas and projects (10 projects)

Candy Chromatography Kit
Ferrofluid Nanotechnology Kit
Calorimeter Kit
Orange Juice Titration Kit
Nitrates, Phosphates & Eutrophication, Small Group Version
Forensic Chemistry of Unknown Substances Kit
The Electrochemical Series Kit
Science in the Kitchen Kit


View Biology Science Fair ideas and projects (16 projects)

How Antibodies Are Used in Blood Typing Kit
Microscopic Life Kit
Properties of Aspirin Kit
Bacteria Growing Kit
Genetics of Blood Types Kit
Forensic Chemistry of Hair Analysis, Small Group
DNA Extraction Kit
Forensic Chemistry of Blood Types Kit

Earth Science and Geology

View Earth Science Fair ideas and projects (8 projects)

Rocks & Minerals Project Kit
Environmental Testing Lab Kit
Weather Experiment Kit
Oil Spill Cleanup Experiment Kit
Soil Test Lab Kit
Soil Analysis Kit
Copper & Iron Test Kit
Erupting Volcano Cross-Section Model

Physics & Engineering

View Physics Science Fair ideas and projects (8 projects)

littleBits Gizmos & Gadgets
Strength of an Electromagnet Kit
Bristlebot Robotics Kit
Electrolyte Challenge Sensor Kit
Build Your Own Crystal Radio Kit
Build a Gauss Rifle Kit
Ping Pong Catapult Kit
Magnetic Levitation Train Kit

Alternative Energy & Fuel

Production of Biodiesel Kit
Veggie Power Battery Kit
Solar Powered Water Desalination Kit
Microbial Fuel Cell Kit
MudWatt Classic Kit
SolarLab 1.0 Electricity Learning Kit
Solar Power Study Kit


Here are a few basic guidelines and tips to help make your science fair project a successful one!

Tip One

Pick a topic that you are interested in learning about. You are simply going to be more enthused to work on your project, gather all the information you can, and learn from it if you are interested in your project. Spare yourself, your parents, teachers, and the judges from a project that bores you. It shows when you really do not care about your project. Look at our Science Fair Project Ideas for some ideas on a possible science fair project.

Tip Two

You do not have to reinvent the wheel with your science fair topic. A good topic can have revolutionary ideas, but more importantly, judges will want to know if you learn something from it and if you used the scientific method to do your project. It is okay to take an existing science project and use it as your project, just modify the variables being tested to make the project your own. Topics that relate to current issues and concerns in society tend to score high points in science fairs (they still have to be well thought out and well-researched projects to score high).

These topics usually somehow relate to how we can improve or maintain our health, welfare, and/or way of life. Avoid politically charged topics. It is hard to stay neutral, and it is usually hard, if not impossible, to scientifically test your theory.

Tip Three

Do your own work. Judges are evaluating what you know about your project and what you learned during the process of your project from start to finish. If your parent, brother or sister, friend or classmate does all your work, you are not going to learn anything. 

Tip Four

Make sure your project is a science project. To be a science project, it must use the scientific method and answer a question. Data must be collected and analyzed in order to conclude whether or not your hypothesis was correct. Demonstrating how something works is not a science project. For example, demonstrating a collection of magic eye tricks does not constitute a science project because no data was collected.

However, if you compare how long it takes specific groups of people (such as children and adults, boys and girls) to see the magic eye tricks, then you have a science project because you are collecting data and can use that data to draw conclusions. (As a side note, although it used to be allowed for elementary students to do observation/demonstration projects, more and more science fairs want elementary students to also use the scientific method and collect data. Therefore, it is best to cover your bases and avoid doing solely an observation/demonstration project.)

Tip Five

Keep your project simple. Try to test only one variable or one hypothesis. The more experiments in the project, the harder it is to keep track of all the factors that influence your science project. There is always next year to expand on this year’s project. Consult our Science Fair Guide for more information on completing a science fair project.

Tip Six

Relax during the interview when presenting your project. The judges are not there to torment you or pick apart your project. They want to see that you did your own work (which can easily be answered by how well you understand your project), that you have all parts of the scientific method, did the steps correctly, and identified any factors that may have caused inaccurate results. Many judges want to know how you can improve your science project or what you would change to account for those factors. The best advice for the interview is to know your project inside and out.

In our free science fair guide, you’ll get a complete overview of what you need to do to create a terrific science fair project! We’ve included topic and project ideas to get you started, plus important experiment steps and tips for arranging your science fair display and presenting it to the judges. The project ideas are divided by elementary, middle school, and high school level. Download the Science Fair Guide now.
One science teacher and homeschool mom says this of our guide:

“Thank you for the science fair guide. It is organized and informative. I appreciate that it gives a general summary and examples. As a teacher, I had more questions from parents concerning their child’s science fair project than from any other topic of the year. I plan to use this guide to help teach my children and others.”
– Jill S., Ohio