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Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

How well can people recall what they have observed. Test your knowledge in this fun experiment.

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

This science fair project teaches students about wilting and browning of salad greens.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science fair project idea produces varying pitches of sound.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

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

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

This science fair project idea explores substances that cause a bubble to last longer.