This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

In this project students experiment with making music using only glasses of water.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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

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

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

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

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!

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

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

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

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

This science project allows students to study the psychology of happiness.

This science fair project idea explores how length affects the weight a bridge can hold.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

This science fair project idea investigates the hardness property of minerals.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

This science experiment tests if dog saliva can really help heal wounds.