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100+ Easy & FUN Science Fair Project Ideas

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Looking for FUN science projects for kids? Science is one of our favorite subjects around here. I have a huge list of over 100 easy science experiments for kids. You can use these classic science fair ideas when helping your child create their next science fair project. Kids will love these fun projects and experiments!

100 Fun and Easy Science Fair Project Ideas for kids

See my Scientific Method Worksheets and Posters to help teach the process of the scientific method including these 6 steps:

  1. Ask a question
  2. Research
  3. Make a hypothesis
  4. Experiment
  5. Record Data
  6. Analyze


These science fair project ideas can be used for may grade levels including elementary school aged kids, middle school aged kids and some would even work for high school. Many of these science activities are quick and easy to put together and will not break the bank either.

I divided the science fair project ideas out the best I could by topic and category for you. That way if there is a certain interest, you can find just what you are looking for. You will find science fair experiment ideas in biology, physics, chemistry, electricity, magnetism, earth science, and more!

All of these simple experiment ideas can be used in some way to create an awesome science fair project. Most are from my site, but many are from some other great bloggers! Click the links to get instructions and demonstrations on how these projects work.

Want more ideas? See also my post with 200 + Elementary STEM Projects.

Easy Energy and Physics Science Fair Projects

Kinetic Energy with Rubber Band Boats– this science project is a blast to create with kids!

Kinetic Energy- Shooting Star Spinner– This is a fun one on kinetic and potential energy

Kinetic Energy Gravity Spinner – Do this experiment to show gravity!

Candle Seesaw Science STEM project

Perpetual Motion Candle See Saw– This is a cool way to learn about motion!

How Does a String Telephone Work? ~Raising Life Long Learners

Which Cup Will Keep Water Cold the Longest? ~ Really, Are you Serious?

Light Refraction Science Experiment ~ Look We’re Learning

Heat Conduction Experiment ~ Look We’re Learning

Color Changing Sensory Bottle ~ The Science Kiddo

Exploring Magnetic Fields

Magnet Pendulum - STEM Experiment

Magnet Pendulum

Levitating Magnets

Train Chain Reactions

Static Electricity Slime

What are Electrolytes?

Color and Light Reflection and Refraction Experiments

Simple Machines- Gears

Light Box Magic ~ True Aim Education

Balloon Air Pressure Experiment ~ Darcy and Brian

Make A Giant Catapult


Technology & Mechanical Science Projects for Kids

Is it Conductive?– test different objects to see if they conduct electricity.

How to Make a Coin Battery – use coins to power a light!

lemon battery science project for kids

How to Make a Lemon Battery– the power of lemon juice is pretty amazing.

What to Make a Dirt Battery – a battery out of dirt?  yup!

How do you Make a Potato Battery? ~from STEAM Powered Family

Story book STEM- Hydraulic Elevator science experiment

How to Make a Hydraulic Elevator ~ Make a water powered elevator

How to Make a Bubble Blower Machine

Paper Circuits– learn about circuits and electricity with this simple project.

Solar Powered Lego Car– harness the power of the sun!

Make an EASY Water Pump Sprinkler


Chemistry Science Projects for Kids With Chemical Reactions

Cabbage Juice pH Experiment– test different chemicals and substances to see their pH levels.

volcano science experiment for kids

How too Make an Erupting Volcano (with salt dough)

How Do you Clean Pennies?

Why Do Baking Soda and Vinegar React?

dry ice bubble science experiment

How to Make Dry Ice Bubbles

Does it Dissolve?

How Do you Grow Crystals? (borax crystals)

elephant toothpaste experiment for kids

Elephant Toothpaste with Two Types of Peroxide

What is Non-Newtonian Fluid? (Oobleck Experiments)

Does it Rust? Oxidation Experiment

Rainbow Absorption

Film Canister Rockets

Blooming Paper Flowers experiment in Water

Blooming Paper Flowers

Dancing Acorns ~ Hands-on Teaching Ideas

States of Matter Experiments– solids, liquids and gases

Rubber Bouncing Egg Experiment

Color Changing Flowers Experiment ~ Messy Little Monster

Paper Burning Experiment ~ Preschool Powol Packets

How to Make a Paper Mache Erupting Volcano ~ Red Ted Art

Mentos and Soda Geysers

Anatomy Science Fair Projects

How Do Ears Work?

Human Anatomy with Play Dough

Play Dough Anatomy

Animal Digestion Experiment ~ Schooling a Monkey

Why We Need Muscles & Bones ~ I Can Teach My Child

How Do Lungs Work?  ~ Sciene Sparks

DNA Experiment

Earth Science and Nature Science Fair Projects

How do Earthquakes Happen?

Can You Build a House to Resist an Earthquake?

Make your Own Crystal Rock Candy Geodes

Colored convection currents science experiment

What are Convection Currents?

Study surface tension with Water Strider Insects

How are Rainbows made?

How to Clean Dirty Water

Geology Experiment: Stalactites and Stalagmites Formation

testing water- science experiment

What’s In My Water? 

What are Shells Made of?

How Can We Stay Dry During the Rain ~ Pink Stripey Socks

What Surfaces in my House are the Dirtiest? Mold Science

Density Experiment with different liquids, also tests buoyancy!

leaf chromatography science project for kids

Why Do Leaves Change Colors? Leaf Chromatography Experiment

Rising Tide Experiment

Soda Bottle Compost ~ Busy Mommy Media

Build a Sun Shelter ~ Buggy and Buddy

Hurricane Model Experiment ~Preschool Powol Packets

Easy Condensation Experiment – Look We’re Learning

Salt Water Density Experiment ~ The Science Kiddo

Plant Science- Observing Bulb Growth ~Buggy and Buddy

How to Make a Compass ~ Parenting Chaos

Why do Pinecones Open & Close? ~ Parenting Chaos

Leaf Transpiration science Experiment

Leaf Transpiration Experiment– how leaves breathe, use a plastic bag to collect the moisture from a tree.

Pumpkin Petri Dishes ~ Hands-on Teaching Ideas

Rainy Day Science– learn about filtering rain water

Making a Solar Still– harness the power of the sun with this cool science experiment!

Make Your Own Human Sun Dial

How are Sedimentary Rocks & Fossils Made? 

How Do Sharks Float? ~ Preschool Powol Packets

Square Bubbles

How to Make Square Bubbles

What Soil is Best for Growing Seeds? ~ Schooling a Monkey


Simple Food Science Fair Project Ideas

Want a food-based science fair project?  These ideas are fun and edible, too!  Who doesn’t love learning with food?

Food Science: Make a Loaf of Bread in a Bag

Why Does Gelatin Not Set with Certain Fruits?

What Foods will Grow the most Mold?

kitchen chemistry cake experiment

Cake Chemistry Experiment

Popcorn and Salt Science Experiment ~ Awe Filled Homemaker

What Prevents Apples from Browning?

How to Make Plastic with Gelatin ~ STEAM Powered Family

Melting Ice Science Experiment ~ The Chaos and the Clutter

Pie Crust Experiment

Food Chemistry Turn Juice into Noodles! science experiment

Food Chemistry~ Turn Juice into Noodles!

Green Eggs Food Chemistry (no food coloring required!)

How Strong are Eggs? ~ Hands-On Teaching Ideas

Make Solar S’mores

Hot Chocolate Science Experiment ~ Creative Family Fun

Bread Mold Science Project ~ Schooling a Monkey


Other Fun & Easy Science Project Ideas

Toilet Paper Comparisons  ~ Pink Stripey Socks

Egg Drop Challenge 

Press n’ Seal vs. Saran Wrap

Hockey Science Experiment ~ Creative Family Fun


I hope you found an idea that will work for your little scientists next science fair project. I’d love to hear what you did and see pictures of the finished project!

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