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20 Fun Science Experiments with Legos

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There is no better pair than science experiments with LEGOs.

Over the years, we have found countless ways to incorporate LEGOs into our STEM classroom activities, and it puts all those tiny LEGO pieces to good use too!

There are so many great ways you can utilize easy LEGO creations to explore science concepts from learning about surface tension to building a car! These great hands-on activities are the perfect way to get your kids excited about science, and make learning more fun.

20 fun science experiments with LEGOs kids will love! Must-try simple LEGO science projects covering chemistry, physics, biology, and more!

These activities are great for kids of all ages, and there are even some your little ones can do too! Here are 20 great LEGO science experiments that your kids will love.

lego challenge cards

Science Experiments with LEGOs that Every Kid Should Try!

If you love LEGO and science, then you’ll want to try these LEGO science projects!

Supplies for LEGO Science Experiments

First, you’ll want to have LEGO bricks on hand. These are our favorite education sets.

You’ll also want to have science supplies on hand. We always stock these:

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20 Must-Try LEGO Science Experiments for Elementary Kids

Elementary kids will love these LEGO science activities and LEGO science projects! Each project listed below is ideal for the elementary classroom and teaches everything from chemical reactions to biology and buoyancy!

LEGO science activities are sure to please every elementary kid! These elementary science projects are just perfect for science and LEGO lovers.

LEGO Earth and Space Activities

Learn How to Make a LEGO Rainbow and have your kids create their own to learn about rainbows!

Explore Lego Shadow Towers and how they’re made using this hands-on science experiment.

Let your kids test what things sink and float in this fun Make LEGO Man Sink and Float science experiment.

Mix science with engineering to make this fun and creative LEGO sundial. Learn How to Make a LEGO Sundial here.

Teach your kids about the phases of the moon and how light shines differently for each phase in the LEGO Moon Phases Science Activity.

Make learning the water cycle simple with this handy 3D Water Cycle Science Project science activity.

Learn about the different layers of soil with this LEGO Soil Layers Activity.

Teach your kids about solar power by making a Solar Powered LEGO Car.

20 science experiments with LEGO that kids will love! Easy LEGO science experiments on biology, physics, chemical reactions, and more!

LEGO Chemical Reactions Experiments

Use your LEGOs to make a LEGO Volcano that erupts in this cool science experiment.

Save the LEGO mini figures in this fun part play part LEGO Ice Rescue Science Experiment!

Make your very own cool Lego Gummy Mummies with this fun science experiment.

Explore with ice, salt, and LEGOs in this fun Lego Science: An Ice Excavation Experiment.

LEGO Biology Experiments

Teach your kids about the heart and how it works with this fun hands-on How to Make a LEGO Heart activity.

Make your very own cool Lego Gummy Mummies with this fun science experiment.

Rescue Hans Solo with this fun LEGO Star Wars LEGO Science Idea.

LEGO Physics Activities

Learn about windmills and wind energy using this hands-on Windmill STEM Challenge.

Learn about balance and practice weighing items when you build a Build a Genius Lego Balance scale.

Learn about magnets and metal using this cool Levitating Paper Clip science experiment.

Teach your kids about surface tension using this hands-on Surface Tension: Experiment with Salt.

Create cars that really move with these cool LEGO Balloon Cars.

Teach your kids to build LEGO Egg Car Race cars and experiment to see what designs will go the fastest.

More LEGO Science Ideas

Grab our FREE printable LEGO STEM challenges and get more LEGO science ideas!

lego challenge cards

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