This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Test whether plants can grow without sunlight and water.

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.

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.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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!

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.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

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

Challenge your learner to design and build a city of their own in this creative engineering activity.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

Transform your uncomfortable wooden shoes into charming mini planters!

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Using a toy race car kids create a visual model of the Doppler Effect.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

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

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Here's a pressed leaf card project that puts science and writing together for your second grader.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

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.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Enjoy those warm spring and summer nights with your child while teaching some basic astronomy at the same time.

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.