Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Science fair project that examines the physical features of elephants and butterflies and draws conclusions about their similarities.

This science fair project idea determines effective strategies to help students stay awake and attentive.

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

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

In this experiment you will use plastic and magnets to test your local soil composition.

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

In this experiment, students create music with subliminal messaging to try to influence people's decision-making.

In this "paper and pen" science fair experiment, students will research the difference between standard time and astronomical mean time.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

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.

Are red apples really sweeter than green apples? The objective of this science fair project is to test the theory with quantitative evidence.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Science fair project which measures the amount of heat energy released by a burning candle by calculating how many calories of heat it emits.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This project analyzes people's emotional responses to images in painting vs similar images in photographs.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

This science fair project idea explores if male or female humans are more likely to exhibit some form of color blindness.

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

The objective of this science experiment is to evaluate the affects of high and low heat capacity on a material's heat retention ability.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.