Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

The goal of this fun science experiment is to explore the limitations of sight and learn working of the human eyes.

Learn about endothermic and exothermic reactions and energy exchange by experimenting with temperature change in chemical reactions.

Science fair project that creates a pamphlet to help others learn about Epilepsy, its causes, symptoms and treatments.

Learn about what happens to a current-carrying wire in a magnetic field in this cool electromagnetism experiment!

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

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

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

Learn whether dark green and leafy veggies tend to have a higher Vitamin C content than lighter green varieties.

In this science project, learn about soil porosity and measure the percent porosity of sand, silt, and clay.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Kids make an electromagnet in this electromagnetic induction experiment to learn about induction, current, and the right-hand rule.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Learn about emulsification and bile's roles in digestion, and investigate how the digestive enzyme lipase breaks down lipids.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Explore the role of starches as thickening agents in food, and learn about the chemical properties of starch in the process.

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

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