This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

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.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

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

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

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

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

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

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

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

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

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

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.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

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

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

This science fair project teaches students about wilting and browning of salad greens.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea determines which method of hand cleansing is the most effective.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

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

In this experiment you explore how tectonic plates move to create land and expand bodies of water.