It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

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.

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

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Check out this cool science fair project on identifying rocks and minerals for kids.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

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

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Demonstrate how to tell the age of an egg without having to crack it open.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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

This science fair project idea investigates if fats add to the flavor of food.

Discover whether a metal will expand under hot water.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

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

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

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

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?