In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

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

This science fair project idea examines liquids of different densities.

For a fun family activity to introduce your child to genetics, have your child go on a search for dominant and recessive family genes!

The project determines which laundry detergent is best for cleaning clothes.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

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

This science fair project idea provides evidence that air is everywhere and takes up space.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

In this project, different brands of microwave popcorn are tested and compared.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

This project investigates the affect of storage temperature on microwave popcorn.

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.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Invite your third grader to do taste test science to observe how a strawberry tastes when it is paired with various condiments. The results may be surprising!

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Construct batteries that make electricity from fruits with this fun science fair project.