Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Determine whether fresh vegetables have more calories or less calories than canned vegetables.

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

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

In this science fair experiment, kids will use the acid test to discover how to tell one mineral from another.

In this experiment, you will evaluate whether or not a diet that is supplemented with "brain-enhancing" foods can help improve memory.

Learn about how sugar fermentation and growing yeast in this easy science project! Yeast is a eukaryotic microbe that puts the fun in fungus!

Discover the interactions of synthetic dyes and natural dyes on natural and artificially-made fabrics.

Should you use âFITâ Fruit and Veggie Wash or plain water to wash your produce? Find out in this science fair project idea.

This science fair project idea demonstrates how our fingers prune when in water.

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

This experiment explores whether music affects the growth of bacteria and could help figure out better ways to process sewage and other microbe-assisted duties.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

Check out this fun science fair project idea to explore the process of diffusion in a cell and learn the difference between osmosis and diffusion.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Demonstrate how we are able to locate sounds, echolocation. Have a blindfolded subject locate you by the sound of your clapping.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

Find out whether matching resonant frequencies can cause objects to shatter.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

This science fair project investigates why the number of visible stars changes from place to place.

The objective of this science fair project idea is to explore which brands of "anti-fade" shampoos work the best to keep hair color looking fresh.

Find out whether matte or shiny nail polish lasts longer.

This experiment will explore whether adding different substances to a gel affects its strength.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

This science fair project idea investigates food preference of birds.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.