100+ Fun & Easy Science Fair Project Ideas for Kids (K-12)
This post may contain affiliate links.
Looking for fun science fair projects? Whether you’re a student, teacher, or parent, this list of 100+ exciting and easy science fair project ideas is perfect for elementary, middle, and high school students. Many of these experiments use simple household materials, making them affordable and accessible for any science fair or classroom project.
How to Choose a Science Fair Project
Selecting the right science fair project can make all the difference. Here are a few tips:
- Pick a topic that interests you (chemistry, physics, biology, etc.)
- Make sure you can follow the scientific method (Ask a question → Research → Hypothesis → Experiment → Data → Conclusion)
- Use materials that are easy to find
- Keep it at an appropriate difficulty level for your grade
See my Scientific Method Worksheets and Posters to help teach the process of the scientific method including these 6 steps:
- Ask a question
- Research
- Make a hypothesis
- Experiment
- Record Data
- Analyze
Frequently Asked Questions (FAQ)
Q: What is the easiest science fair project?
A: Some of the easiest projects include baking soda and vinegar reactions, static electricity experiments, or a simple solar oven.
Q: What makes a good science fair project?
A: A great project follows the scientific method, answers a specific question, and presents clear results with data.
Q: How do I present my science fair project?
A: Use a tri-fold display board, include charts and visuals, explain your hypothesis, method, and conclusion, and be ready to answer questions.
Q: What are some last-minute science fair projects?
A: Try testing the best way to keep ice from melting, making a balloon-powered car, or testing different battery brands for longevity.
Download a free printable STEM Lab Sheet to use these in your teaching!
Fun & Easy Science Fair Projects for Kids
These science fair project ideas can be used for many 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– Explore how stored energy is released.
Kinetic Energy- Shooting Star Spinner – Test potential and kinetic energy using a homemade spinner.
Kinetic Energy Gravity Spinner – Do this experiment to show gravity!
Perpetual Motion Candle See Saw– Observe motion and balance forces.
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
Color and Light Reflection and Refraction Experiments
Light Box Magic ~ True Aim Education
Balloon Air Pressure Experiment ~ Darcy and Brian
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!
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? Â yup!
How do you Make a Potato Battery? ~from STEAM Powered Family
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 household items to see their pH levels, their acidity and alkalinity.
How too Make an Erupting Volcano (with salt dough)
Why Do Baking Soda and Vinegar React?
How Do you Grow Crystals? (borax crystals)
Elephant Toothpaste with Two Types of Peroxide
What is Non-Newtonian Fluid? (Oobleck Experiments)
Does it Rust? Oxidation Experiment
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
Anatomy Science Fair Projects
Play Dough Anatomy – Make models of human organs.
Animal Digestion Experiment ~ Schooling a Monkey – Simulate the digestive process using crackers and soda.
Why We Need Muscles & Bones ~ I Can Teach My Child – Test how muscles work with bones.
How Do Lungs Work?  ~ Sciene Sparks. – Build a lung model with balloons and a plastic bottle.
DNA Experiment – Extract real DNA from strawberries!
Earth Science and Nature Science Fair Projects
How do Earthquakes Happen? Simulate seismic activity with household materials.
Can You Build a House to Resist an Earthquake?
Make your Own Crystal Rock Candy Geodes – Study mineral growth and crystallization.
Study surface tension with Water Strider Insects
How to Clean Dirty Water– Experiment with filtration methods.
Geology Experiment: Stalactites and Stalagmites Formation
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!
Why Do Leaves Change Colors? Leaf Chromatography 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 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!
How are Sedimentary Rocks & Fossils Made?Â
How Do Sharks Float? ~ Preschool Powol Packets
What Soil is Best for Growing Seeds? ~ Schooling a Monkey
Simple Food Science Fair Project Ideas
Want a food-based science fair project? Â These ideas are fun and edible, too! Â Who doesn’t love learning with food?
Food Science: Make a Loaf of Bread in a Bag– Learn about yeast fermentation.
Why Does Gelatin Not Set with Certain Fruits? – Test enzyme activity.
What Foods will Grow the most Mold?– A fun microbiology experiment.
Popcorn and Salt Science Experiment ~ Awe Filled Homemaker
What Prevents Apples from Browning?– Discover oxidation and preservatives.
How to Make Plastic with Gelatin ~ STEAM Powered Family
Melting Ice Science Experiment ~ The Chaos and the Clutter
Food Chemistry~ Turn Juice into Noodles!
Green Eggs Food Chemistry (no food coloring required!)
How Strong are Eggs? ~ Hands-On Teaching Ideas
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
Hockey Science Experiment ~ Creative Family Fun
This list of 100+ exciting science fair projects covers all grade levels and subjects! Whether you’re looking for a quick and easy project or something more advanced, there’s an experiment here for you.
Save this list for later! Which project are you trying first? Let us know in the comments!
