Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Have your child kick off their summer vacation by making a miniature water slide!

In this fun activity, your child will create their very own solar oven to bake s'mores!

Discover whether a metal will expand under hot water.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

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

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Science fair project that examines condensation and the conditions needed in order for dew to form.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!