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This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

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

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

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.

Do you think heat can affect a plant's growth rate?

This science fair project idea explores the different properties & interactions of sugar molecules.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

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

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

In this fun experiment, we'll find out how color affects heat absorption!

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

This science fair project idea determines what household items are good conductors of electricity.

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

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

This science fair project examines how seeds hitchhike on animals and clothing.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.