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Third Grade Physical Science Activities

Third grade physical science activities take science concepts that kids learn in the classroom and put it into practice! These fun science projects for third graders include a range of concepts, from air pressure and sound to chemistry and color theory. Browse the complete collection of third grade science activities for more fun science education on a wide range of topics.

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Third Grade

Physical Science

Balloon Air Pressure Magic

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

The Science of Sound

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

Make a Balloon Stick to the Wall Like "Magic"

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

Vinegar and Baking Soda Balloon

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

Make Your Own Marshmallows

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!

Spinning Color Wheel

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

Make Gak: Experiment with Polymers

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

Make Homemade Glue!

This surprisingly good glue recipe comes from common kitchen items.

Build a Popsicle Stick Bridge

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Explore scientific concepts with this experiment that introduces kids to the scientific method!

Make a Paper Helicopter

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends pennies flying.

Sound and Vibration

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

Create a Constellation

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

Design a Great Glass Xylophone!

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

Sunscreen Experiment

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

The pinwheel is a simple toy that has been around for years and uses the wonders of the wind to spin it and delight kids of all ages!

Pop Bottle Science

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Superhero Strength

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Make Your Own Ice Cream!

I scream, you scream, we all scream for homemade spearmint ice cream!

Make a Keyhole Spy Glass

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

Bending Light Experiment

If your science savy third grader is up for a challenge, let her bend light with a casserole dish!

Homemade Submarine

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

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