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This science fair project idea investigates whether plants can survive being frozen.

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

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

In this science fair project, students create their own miniature salt flats at home.

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

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

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

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

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

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

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

The goal of this project is to create an exciting topographical map out of dough.

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

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

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

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

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.