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This science fair project idea explores how water and ice can change the form of rocks.

This project investigates whether chewing gum can help a majority of people with focus and concentration.

In this kindergarten activity your child will create a map of your house and use a magnet to move pictures of your family through the house!

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

What is vegetative reproduction? Find out how you can clone plants and regrow cabbage from a stem in this cool experiment!

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

This science fair project determines what effect substances have on ice, and which of these products most effectively melts ice.

What if the shape of the Earth weren't spherical? How does its shape affect our gravity, climate, and tides? Model these questions in this cool project!

Make your own greenhouse - out of a balloon! Your child will learn how greenhouses work as they plant radish seeds and watch them grow.

Does nail polish really slow the growth of nails? Explore in this science fair project idea.

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

This science fair project idea determines which method of hand cleansing is the most effective.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Choose a timeline to live without technology. Keep a journal of all the issues encountered. What are the benefits and cons of modern technology?

This experiment explores the most common colors that appear among a sample of crossbred guppies.

Analyze competed scientific studies to determine the effectiveness of ancient remedies. Create a chart that illustrates the effectiveness of these treatments.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project idea determines whether eating before or after exercise is more beneficial to health and performance.

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

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

In this science fair project, students evaluate if the phases of the moon affect the way people feel.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

There is debate about whether chalkboards or whiteboards are better. This experiment explores which leads to better retention of visually-displayed information.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.