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20+ Science Fair Projects with LEGOs that are Educational and Fun

LEGOs and science are a natural pair. There are so many great STEM projects out there that use Easy LEGO Creations to create a fun hands-on experience for kids that make them perfect for science fair projects with LEGOs!

There are so many great ways to use LEGOs to do a variety of scientific investigations from physics all the way to biology and astrology.

If you are looking for the perfect science fair project or activity to do with your kids this year, you can’t go wrong with these LEGO science fair projects. Each of them is unique and a great way to explore science concepts in the classroom. Here are 20 science fair projects with LEGO.

There are so many great STEM projects out there that use Easy LEGO Creations to create a fun hands-on experience for kids that make them perfect for science fair projects with LEGOs!

Science Fair Projects with LEGOs

If you have LEGO lovers in the house, why not use that love of LEGO at the science fair? These LEGO science fair projects are perfect as elementary and middle school science fair project ideas.

lego challenge cards

Our Favorite LEGO Products

Shop these Amazon affiliate links and gather some of our favorite LEGO products that you can bring with you to the science fair!


Here are some LEGO STEM products you can use in your classroom!

All of these LEGO STEM sets have working, moving parts and are a great way to introduce complete STEM builds and activities to your students.

lego amusement park ride working set

LEGO Amusement Park Ride

lego pinball set

LEGO Pinball Table

lego fairground set

LEGO Expert Fairgrounds Set

lego tecnic mars rover

LEGO Mars Rover

lego amusement park game brick loot

LEGO Carnival Game

simple lego engineering kit

LEGO Simple Engineering Kit

lego space rollar coaster set

LEGO Space Roller Coaster

lego classics lots of bricks

LEGO Classic Lots of Bricks

lego pacman building game

LEGO Pac-Man Game

lego friends technical carnival lego set

LEGO Friends Beach Amusement Park

lego gear bots klutz

Klutz LEGO Gear Bots

klutz lego race cars

LEGO Klutz Race Cars

simple machines lego kit

Simple Building Machines

lego ferris wheel kit

LEGO Ferris Wheel

lego drones

Flying Drones Building Kit

lego solar powered robot

Solar Robot Building Kit

lego ultimate stunt riders challenge

LEGO Ultimate Stunt Riders Challenge

Science Fair Supplies

Grab these supplies if you’re headed to the science fair!

Science Fair Project Ideas that Use LEGO Bricks

Follow along with these ideas for science fair projects you can do using LEGO!

These LEGO science fair projects are the perfect way to mix a love of LEGO with a love of science!

Try making this LEGO tree life cycle with this Earth Day LEGO challenge!

Use this unique activity to find out to be able to answer the question, Is Wood Waterproof?

Conduct your very own water experiment by letting your kids build their own LEGO Dam.

Teach your kids about gravity and building by having them create this cool LEGO Maze.

Learn about what happens when you combine baking soda and vinegar to make a LEGO Volcano.

Experiment with velocity using this LEGO Balloon Powered Car.

Learn about weight and motion with the help of this LEGO Catapult.

All you need are a few simple materials to make this LEGO Electricity Science Experiment.

See who can create the best boat using this Balloon Powered Boat experiment.

Teach your kids about magnetic attraction with this LEGO Magnet Maze.

Bring the concept of surface tension to life using legos and salt with this Surface Tension Experiment.

Bring the water cycle to life using legos with this LEGO Water Cycle Model.

Learn about weight and balance using this LEGO Balance Scale STEM Project.

Showcase the destruction of an earthquake in a new and exciting way with this LEGO City Earthquake.

Bring the wonders of space to life by making this LEGO Solar System.

Learn about density and how it works in this LEGO Density Experiment.

Use LEGOs to create shadows with this LEGO Shadow Towers experiment.

Your kids will love Making a Constellation Viewer out of LEGOs in this fun experiment.

Defy Gravity in this fun Star Wars Science: Gravity experiment.

Use LEGOs to teach your kids about earthquakes in this Earthquake Experiment.

lego challenge cards

More LEGO Activities to Try

20 Creative Ways to Make LEGO Fidget Toys

20+ STEM Activities with LEGOs that Every Kid Should Try!

20+ Simple Lego Engineering Challenges Kids Can Do Alone!

LEGO Math Ideas

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Thursday 1st of February 2024


Sunday 4th of December 2022

Make a Lego house