In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

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.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

This project explores ways to prevent static electrical shocks.

In this science fair project, students use the streak test to tell minerals apart from each other.

Find out whether putting something on top of a plant will inhibit its growth.

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

Explore if planting seeds in a certain direction will affect how fast it germinates.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

In this project, the affects of vitamin E are observed on a rose petal.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

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

This science fair project idea examines whether boys and girls differ in reflexes.

This science fair project idea examines liquids of different densities.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.