50 Science Fair Project Ideas for Elementary to High School Kids!

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Do you need a science fair project idea? Look no further! We have 50 science fair project ideas for kids of all ages!

50 Science Fair Projects for all ages

Image of bacteria project and acidity project

50 Science Fair Project Ideas for Elementary to High School Kids!

We’ve rounded up the best science fair project ideas for all ages. These projects use living things like plants and bacteria. Other projects work with batteries and electricity. And of course there is slime! If you are interested in the environment, this is a great place to start. There are projects using color for the artists among us. There are ideas about fingerprints and genetics. Sign me up for the projects that use candy. There’s something for everyone!

Getting Started: Best Science Fair Project Tips 

science fair project tips

Image of a blackboard of equations

The hardest part of a science fair project can be getting started, so check out these steps!

  • Think about what is interesting to you. Do you love food? Are you obsessed with cats or dogs? Are you curious about soil? You’ll find a wide range of fun topic ideas for your science fair on this list. 
  • Pick a topic or project idea from this list.
  • Brainstorm questions  about the topic. Check out this resource via Science Buddies
  • Turn your idea into a science fair project. Steve Spangler Science explains that there are three steps for turning an experiment or demonstration into a science fair project. Once you find an idea you like, you must change something about it. Then, create a new experiment. Finally, compare results!

Some of the ideas in this post are demonstrations that you can turn into projects. For example, consider making your own fire extinguisher. We know that baking soda and vinegar deprives fire of oxygen. This is what puts the fire out. Change the ratio of baking soda to vinegar to create a new experiment and compare results. Or see what changes you can make to to cause your fire extinguisher to shoot the farthest

  • Create a poster to present your project. 

Below, you’ll find ideas for elementary school, middle school, and high school science fair projects!

ELEMENTARY SCHOOL SCIENCE PROJECTS

elementary school projects

Image of magnetic mud project, egg drop project, and lemon battery project

Some kids participate in their first science fair projects in elementary school. It’s never too early to combine creativity with science! Check out how even preschoolers use the scientific method in this Kids Activities Blog post.

Elementary school students learn about animals and plants. They study cells, the solar system, and weather. Most importantly, elementary students learn to wonder about how the world works. Here is a list of 15 ideas to introduce kids to the wonderful world of science!

Food Ideas

This is a classic science experiment. Be sure to change a variable. Then compare results to make the egg drop worthy of a science fair!

Maybe I shouldn’t be amazed that you can turn a lemon into a battery, but I am. I really am. Compare results with a potato battery via LoveToKnow.

Get up close and personal with the genetic code of a strawberry. 

Experiment with dissolving Peeps in different liquids. Then eat the leftovers!

What’s a naked egg? It’s an egg without an intact shell! It’s weird. Check it out.

Explore the relationship between ice and salt with this fun experiment.

Sensory Ideas

Magnets are fun! Mud is fun! Without a doubt, your kid will enjoy combining the two.

Do your kids love dinosaurs? Do your kids love slime? If so, you should check out this project. Be sure to download the free science experiment printable.

Life Science Ideas

This is the “naked egg” experiment that also explores the concept of osmosis! 

Kids will compare bacteria growth and they will drink soda. It’s a win-win, for the kids at least!

This is a list of questions to jumpstart a science fair project for animal-loving kids!

Check out these science projects using plants! This link provides projects with different levels of difficulty.

Physics Project Ideas

This is perfect for kids who want a simple project using math.

Because kids love trains!

Solar System Project Ideas

  • Solar system project ideas via NASA

NASA put together a list of questions to get kids started on their projects!

MIDDLE SCHOOL SCIENCE PROJECTS

middle school science fair projects

Image of a boy with a microscope, plants, colors, and a fingerprint

Have you and your family watched the movie Wonder? If your kid isn’t excited about the science fair, check out this movie. The main character and his best friend make a winning  pinhole camera for their science fair. This project would be perfect for a middle schooler interested in light. And of course it’s on our list of project ideas!

Along with the pinhole camera, we have 19 other ideas. Middle schoolers learn about about the human body and cells. They also learn about the environment, electricity, and sound. This list contains projects on these topics and more!

Earth and Environmental Science Ideas

Learn about conservation with this grey water recycling system.

Use this list of project ideas that test hypotheses about the weather.

Experiment with soil erosion and learn about the importance of vegetation!

Check out this great list of 30 eco-friendly science fair project ideas!

Isolate and change variables to maximize the geyser explosion. 

Kids will enjoy learning about why garbage smells bad. 

Genetics Ideas

Projects on genetics are popular because kids learn about themselves and their friends. Check out this taster versus non-taster experiment!

Any future forensic scientists out there? In this project, kids create a system for classifying fingerprints!

This is one of the coolest dinosaur related projects! Kids can search databases to find T-Rex’s closest living relative. So cool!

Physical Science Ideas

As I mentioned above, this is a project like Auggie’s in Wonder!

Check out this list of science projects using simple machines. One project even involves roller-coasters!

This project creates a model that demonstrates how eardrums work.

Try out this list of science fair project ideas that explore magnetism.

Did you know you can make a fire extinguisher from common household supplies? If not, this experiment is for you!

Middle schoolers think gas is hilarious. Right or wrong, here’s a science project about gas!

This project considers the relationship between beverage color and taste!

You’re probably already using a charcoal filtration system. Kids can learn how water filtration works by making their own!

  • Paper airplane launcher via KiwiCo

Paper airplanes are fun for everyone. Check out this experiment and launch that airplane!

Life Science Ideas

Experiment with making cells shrink with water. 

Do you know how algae grows best? Try this experiment to find out!

HIGH SCHOOL SCIENCE PROJECTS

high school science fair projects

Image of crystal experiment, botany experiment, and bacteria experiment

High school science covers a range of subjects from biology to meteorology. Therefore, nothing is off limits when it comes to choosing a science fair project idea! These ideas would be suitable for most high school curriculum. When looking through the list, remember that you can make any of these ideas more complex by changing variables and comparing results.

Genetics Ideas

Calling all cat people! In this experiment you will discover the relationship between chromosomes and cat coat coloring. 

This fingerprint detection project is perfect for the high schoolers who love true crimes!

Earth Science and Nature Ideas

Discover which plants grow best locally and the impact these plants have on the environment.

There are so many great plant projects here!

Experiment with growing your own crystals.

Life Science Ideas

Check out this list of questions to start a project about bacteria.

This is a great microbiology experiment!

Hypothesize and learn about starch in photosynthesis.

Test whether food picked up from the floor within 5 seconds collects less germs than food dropped for a longer amount of time. I do not recommend eating the dropped food. 🙂 

Discover how acidity can affect survival rates of a population!

Physical Science Ideas

Impress science fair judges by designing and testing your own heart rate monitor! 

Use electrolysis to split water into hydrogen and oxygen. Then test the gases! 

Did you know plastic can be found in milk? This is a fun project using regular household supplies.

Check out this list of project ideas dealing with drug addiction. 

  • Increase the amount of oil that can be moved through a pump via LiveScience

Use a clear household spray bottle to simulate a crude oil pumping station!

discover 50 science fair projects for all ages

Maybe one day your little scientist will make it big. In the meantime, we hope these ideas inspire great learning experiences. That’s the purpose of science fairs!

If you are looking for more science activities, be sure to  check out 150 Kids Science Activities via Kids Activities Blog.

Comment below to tell us how your science fair project turns out! We would love to hear about it!

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