This science project allows students to study the psychology of happiness.

The project investigates which soft drink is worse for your teeth by observing the affect of soft drink on limestone.

This project tests the hypothesis that dark colors absorb more heat than light colors.

This project determines what category of person is most likely to be ticklish.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

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

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.

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

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?

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.

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.

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.

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 how the shape of a boat affects its density and how much weight it can float.

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

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

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.

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

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.