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

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Science fair project that tests whether cats have a preference for organic food.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science fair project idea discovers the average time it takes for a person to remember something completely.

Science fair project that demonstrates the process known as refraction, which allows glasses and contact lenses to help people with poor vision.

Science fair project that demonstrates how a rainbow forms, by using water to split white light into its many colors.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

Science fair project that determines whether wireless networks damage living plants. Are WiFi radiation hazardous to your health?

What are the benefits of good posture? Kids will learn about the cognitive effects of good posture through conducting and observing a controlled experiment.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

Make a backbone model to explore human anatomy and life science.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This science fair project ideaexplores whether cooking food destroys potential vitamin levels.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Research camouflage products and techniques, test quality by timing volunteers. Calculate the average length of time to recognize the subject.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

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

This science project examines the thermal properties of several major greenhouse gases.

The goal of this science fair project is to determine which cheese grows mold the fastest: Vermont Cheddar, American, Brie, or Camembert?

Research currently available fuel sources, and fuel manufacturing and processing techniques. Propose an alternative fuel source.

This science fair experiment organizes made-up elements to simulate Mendeleev when he made the periodic table of elements.

The goal of this science fair project is to investigate the effect of irradiation on the germination and growth of vegetables, such as the tomato plant.

Make stunning pendulum waves and learn the math behind the patterns generated with this cool and easy science project.

Check out this fun science fair project idea to measure bacterial colonies from door handles and explore the effectiveness of different cleaning agents.

How fast is the wind blowing? This science experiment provides step-by-step instructions to help you answer this question.

Science fair project that studies how the brain transforms man-made symbols into meaningful concepts.