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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 free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.

This fascinating science fair project explores eye color genotypes.

Can you stain teeth with tea, coffee, or coke? Explore how in this science fair project idea.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

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.

This science project examines the thermal properties of several major greenhouse gases.

In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

Got a young scientist at home? Try this project with him!Create your own molecule design with this home-made clay recipe and some toothpicks!

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Check out this fun science project idea to measure the amount of vitamin C in ripe, half-ripe, unripe and stored oranges.

Test your skills as a weather forecaster, and learn some science terms on the way!

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

Make a periscope with milk cartons and mirrors! This preschool activity is great for playing secret agent and learning simple physics.

Make a wish upon a tree with this craft that also helps your child learn more about Chinese culture.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

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.

In this science fair project, students evaluate the alleged pain-relieving properties of amber.

Start your toy engines -- this is going to be a fast and friction-filled race!

Determine if âdouble dippingâ chips really spreads more germs than dipping only once per chip.

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

Kids learn about Brownian motion, diffusion, and how temperature is a key factor affecting the rate of diffusion in this cool science project.

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!

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

Science fair project in which you will graft branches from different fruit tree onto a root stalk.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.