Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

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

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

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

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

This science fair project idea investigates if fats add to the flavor of food.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

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

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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

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.

Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

This science fair project idea investigates the hardness property of minerals.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea determines the probability of a coin landing heads or tails.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

The purpose of this science fair project is to build a basic radio.

Find out which type of sponge holds the most water.

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

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