This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

This science fair project compares the allelopathic chemical produced by the Black Walnut tree to a commercial herbicide in stopping the growth of a shrub.

Is it a square or a circle? See if you can trick your friends with this zany science project!

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This cool electricity project teaches kids how connecting batteries in series vs. parallel circuits can contribute to different levels of voltage and amperage.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Kids will love making clouds and learning how to make a water cycle model in this fun science fair project idea that explores evaporation and precipitation.

This project examines various algorithms to determine the ideal algorithm for a strategy game.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

Check out this science project idea that will have your kid investigate how dots (also known as pixels) are used to create digital photographs.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

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

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

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Get a cool science project idea on a photovoltaic cell and explore the various factors that affect the energy output of the photovoltaic cell.