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This science fair project idea experiments with spinning color wheels and optical illusions.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

This science fair project idea produces varying pitches of sound.

This project examines whether people's taste perception is influenced by what they see.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

Help your child understand surface tension by showing them how they can create a "skin" on top of water.

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

In this game, players will learn interesting facts about animal adaption and practice them using a fun matching card game!

This science fair project idea examines the reason boats are shaped and engineered.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.