How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

This project compares the strength of one, two, and three-ply toilet paper.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This science fair project idea investigates how the shape of an object affects drag.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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.

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

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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

This science fair project idea investigates how magnetism can defy the force of gravity.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

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

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

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

This science fair project idea investigates the difference in reaction times between boys and girls.