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Third Grade Science Activities and Experiments

Browse through our Third Grade science activities & experiments. We have many Third Grade science activities to keep your student learning on the fly, all year long. For more in depth science projects, take a look at the Science Fair Project Ideas section of the site.

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Showing 1 to 15 of 91
Make beads out of rose petals for a fun and fragrant arts and crafts activity! This activity is perfect for elementary school children.
Make Rose Petal Beads
Third Grade
Life Science
Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.
Grow Salt Crystals!
Third Grade
Earth & Space Science
Hatch a praying mantis egg case in a homemade habitat with your child's help! This is an amazing experiment in science and nature for kids of any age.
Hatch Your Own Praying Mantises
Third Grade
Nature Activities
Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!
How Old is That Tree?
Third Grade
Life Science
Clouds are formed when warm and cold air meet. Here's a way for kids to see it all up close!
Make Your Own Cloud!
Third Grade
Earth & Space Science
Get your sense of humor ready for this third grade science experiment, which demonstrates fundamental physics of air pressure.
Balloon Air Pressure Magic
Third Grade
Physical Science
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?
Design a Floating Cork Boat
Third Grade
Physical Science
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 Keyhole Spy Glass
Third Grade
Physical Science
This year on Mother's Day, try this gift project that brings together an appreciation for gardening with a hands-on lesson in art history.
Watering Can Craft
Third Grade
Nature Activities
Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.
Make Your Own Putter
Third Grade
Physical Science
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 a CSI Kit
Third Grade
Physical Science
Pair a planetarium visit with this fun art project that mimics the look of far-off galaxies.
Make a Galaxy Mobile
Third Grade
Earth & Space Science
Try the classic balloon-on-wall trick with your kids and watch static electricity in action.
Make a Balloon Stick to the Wall Like "Magic"
Third Grade
Physical Science
Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!
Make Your Own Marshmallows
Third Grade
Physical Science
Making your own glass cleaner is easy, effective and inexpensive!
Make Your Own Glass Cleaner
Third Grade
Physical Science

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