In this project, waves of vibrations are experimented with using water in glasses.

This science fair project idea determines if family members can recognize one another using only the sense of smell.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

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

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this project, several food items are tested to determine whether they contain starch.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

This science fair project idea explores substances that cause a bubble to last longer.

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

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

In this fun experiment, we'll find out how color affects heat absorption!

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science fair project idea investigates the difference in reaction times between boys and girls.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This science fair project idea examines liquids of different densities.

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

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

In this project, a mnemonic is used to test how it increases memory.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.