This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

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

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

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

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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

This science fair project idea investigates how color affects temperature.

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

This science fair project idea determines if the color of light affects the growth of plants.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This science fair project investigates why the number of visible stars changes from place to place.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

This science fair project idea investigates how the shape of an object affects drag.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.