Science Fairs are such a fun way for kids to get some in-depth, hands-on science experience and discover that science is fun! We have found over 35 really cool, easy science fair projects for kids of all ages! These science fair projects for kids can be used at school home or homeschooling coop. Kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, and 7th grade students will have fun with these science project ideas that your child can do by themselves!

Easy science fair projects
So your school, co-op, or homeschool group is hosting a Science Fair and your child wants to participate? How fun! Here are some great Science Fair projects that he or she can complete all by themselves. These science fair ideas are great for children of all ages from kindergartners to elementary age students in grade 1, grade 2, grade 3, grade 4, grade 5, grade 6, and grade 7 students. Use these group projects (multiple ages or grades can work together), simple science project, or individual competition. No matter which one your child chooses, you can be guaranteed the educational experiences in each of these is stellar!
Science Fair Projects for Kids
- The first one in this list is obvious – no Science Fair is complete without at least one volcano! They’re always a hit, and never get old.
- Kids can learn about floating and sinking, and properties of water with this water balloon science experiment.
- You know how apples turn brown once they’re peeled? Teach your child about the oxidation process
with this practical engineering challenge with apples. - For kids who are passionate about animals, let them explore the biology concept of animal cell structure.
- Shrinky Dinks are also a fun way to display what your child has learned about animal cells
and/or plant cells. - If the Science Fair occurs in the winter, what a perfect time to create
your own frost! - Growing crystals is always a fun one! Don’t neglect the fascinating opportunity to grow your own.
- Cracked eggs can make an interesting place to grow crystals – they look like geodes!
4th grade science fair projects
- Play around with exothermic reactions (it’s not scary) and observe rust forming on steel wool with this
simple experiment. - Kids can observe “anti- gravity” phenomena and experience the Science of air pressure with a
couple of household objects: a ping-pong ball and a hairdryer. - Children who are learning about human anatomy might enjoy creating a model of the
human ear. - Got a child who loves engineering, physics, and simple machines? Let them design and build a pulley.
- Your little engineer might also enjoy learning about mechanical energy with this
experiment that also involves candy. - Your little scientist who loves electricity will enjoy this
electronics project that gives them experience with circuits and closed loops. - Also interesting to young electricians is this
electromagnetic train. - Harness electricity by creating your own homemade battery.
- Astronaut dreams can be fulfilled early by letting your youngster create their own DIY
planetarium constellation projector that displays his/her favorite constellations. - Colors can be separated through a simple science chromatography investigation, that also ends with a pretty flower for
display!
3rd grade science fair projects
- Candy is always a great hands-on object to use for any project or lesson – including Science Fairs!
Take some candy, add water, and observe what happens to the artificial colors. - Short on time? This solar light project only takes 5 minutes to set up!
- Cohesion, Adhesion, and surface tension are observed in this
capillary action science experiment that only requires cups, paper towels, and food coloring. - Your younger children will love learning about the senses and creating Oobleck to experiment with.
- To explore the sense of sight, try this vision science experiment.
- Impress your child who is fascinated with weather with this
experiment that allows him/her to observe how a weather vane works. - This really cute “tiny dancer” experiment is a great way to engage your child who loves dance to
learn about homopolar motors. - Combine Art and Chemistry with a diffusion
watercolor art project. - Your child can make a car out of recycled materials that actually runs. Just use rubber bands to
“motorize” it!
Cool science fair projects
- Motivate your little cook with some practical kitchen Science – make butter!
- With your help, your kitchen expert can learn about casein and make “plastic” out of milk.
- Playdough is the perfect thing to use to create a model of the inside of the earth.
- Leaves change color every fall, and your child can use this
experiment to learn and display how it happens. - Carbonation in sodas can teach children about carbon dioxide and physical
reaction points. - Vinegar, baking soda, and water create a
chemical reaction that makes raisins dance. - Explore density of different liquid mixtures with this rainbow density Science experiment.
- DIY lava lamps show children that oil and water don’t mix.
science fair projects for 4th grade
Science for Kids
Looking for lots more fun, science experiments for kids? You’ve GOT to try some of these outrageously fun science experiments for kids! We have so many fun, creative and easy science experiments for elementary age children:
- 100 Amazing Food science experiments for kids – arranged by type of science
- Colorful Capillary action science experiment (also known as walking water)
- Amaze kids with these 12 Hands on Science experiments with batteries
- 24 Epic Solar system science projects to try this week
- Fun Water balloon science experiment that explores density
- 50 Fun Preschool science experiments the whole family will want to try
- Simple Galaxy science project
- Easy and Fun Dancing Raisins Experiment
- Learn about weather as you find how to make a weather vane
- Eye opening Eye science experiments
- Easy-to- make Air pressure science project
- Amazing POP rocks science experiment is one of our all-time favorite science experiments we like to do during the summer are
- Stunning Chromatography Flowers are so pretty you’ll forget it was as science project!
- Quick and EASY Lemon Volcano – a fun twist on classic volcano science project using acidity of lemon instead of vinegar as the acid
- How to Make a Lava Lamp – super easy and SO cool!
- 30 Simple machines science projects kids will want to try
- Easy, fascinating, and colorful project answering Why do Leaves Change Color Experiment
- Free Printable Animal Classifications for Kids Cootie Catchers
- 19 Edible science experiments – which delicious project will you try first?
- HUGE Free Solar System Unit (coloring pages, hands on science projects, worksheets, and more!)
- Pipe Cleaner Constellation Activity (As seen on Good Housekeeping!)
- Teach kids about conductivity with this fun squishy circuits projects
- Amazing, Heat Sensitive, Color Changing Slime
- Life Cycles for Kids (from penguin to sunflower and spider to turkey we have LOTS of life cycles to explore and learn about)
- EASY, Colorful Oil and Water Science Experiment
- Kids will be amazed as you change colors of white flowers with this Dying Flowers Science Experiment
- This super cool Lego Zipline is fun and simple to make
- Human Body Project
- Check out this super cool look INSIDE a Volcano Project
- Exploding Watermelon – science experiment that explores potential and kinetic energy with a big WOW moment!
- Memorable Life Size Skeletal system science project – includes free printable template
- Find LOTS more Easy Science Experiments for kids of all ages!
Baking Soda Vinegar Experiment
There are so many fun ways to play and teach kids about chemical reactions using a baking soda and vinegar reaction. Here are some of our favorite baking soda and vinegar activities.
- 5, 4, 3, 2, 1, BLAST OFF! Rocket Baking Soda and Vinegar Experiment
- Dancing Raisins Experiment
- Look Inside a Volcano Experiment for Kids
- Science Play – Dinosaur Activities for Preschoolers
- Glitter Volcano Pretty Science Experiment
- Science Powered Boats with Baking Soda and Vinegar Experiment
- Rainbow Activities for Preschoolers
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