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In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

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

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

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

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

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science fair idea is a great way for kids to explore static electricity. Kids will give a comb a static charge and watch as it separates pepper from salt.

In this project children practice the scientific method while playing with puffy paint.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

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.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

Find out whether matte or shiny nail polish lasts longer.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Invite your kindergarten scientist to conduct this color mixing experiment to discover which primary hues make a rainbow of secondary colors.

The objective of this science fair project is to study the photosynthesis process and demonstrate the important role that leaves play in the process.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.