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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

Make Homemade Glue!

This surprisingly good glue recipe comes from common kitchen items.

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.

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 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.

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!

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.

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.

Make Your Own Marshmallows

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

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!

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

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 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!

Make a Water Magnifier!

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

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

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.

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!

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.

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.

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.

Make a Handwriting Analysis!

Hone your child's skills of observation and take a look at forensic science for an interesting afternoon of exploration and detective work!

Bending Light Experiment

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

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