Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This science fair project idea provides evidence that air is everywhere and takes up space.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science fair project idea explores whether color affects a person's emotional state.

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.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Teach your child how butter is created by shaking up cream the old-fashioned way.

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

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

An home science experiment for older students that teaches about the science behind heat.

This science fair project idea determines the most effective method of preserving food.

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

This science fair project idea deals with the qualities of shade on a sunny day.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

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

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.

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.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.