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Find out whether packaged seeds actually do expire in this new science fair project idea.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

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.

Discover whether a metal will expand under hot water.

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

This science fair project investigates why the number of visible stars changes from place to place.

Construct and experiment with a periscope using reflected light rays to gather an image.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

This science project teaches students to classify different shapes of leaves.

Find out whether putting something on top of a plant will inhibit its growth.

Discover whether cold or hot water from the faucet will boil faster on the stove.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

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

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

Discover how and which salt melts ice the quickest.

Take a dive into the candy jar with this yummy science experiment.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

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!

Examine the effect of pressure on carbonation in soda.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

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.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.