Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

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.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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?

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

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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.

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

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

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

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Is it a square or a circle? See if you can trick your friends with this zany science project!

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science fair project idea examines which type of insulation holds in the most heat.

In this design challenge, your child will make a bottle rocket using typical household items.