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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

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.

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 a Water Magnifier!

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

Make Homemade Glue!

This surprisingly good glue recipe comes from common kitchen items.

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

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!

Bending Light Experiment

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

Triboluminescence Experiment

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

Nice Shades! How Light and Color Affect Sight

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

Design a Floating Cork Boat

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

Play Forensic Flashlight Tricks

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

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!

Make Your Own Glass Cleaner

Making your own glass cleaner is easy, effective and inexpensive!

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 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!

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

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.

Balloon Air Pressure Magic

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

Make Your Own Marshmallows

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

Sunscreen Experiment

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

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.

Homemade Barometer

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

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.

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