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How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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

Explore scientific concepts with this experiment that introduces kids to the scientific method!

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

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.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This project determines what category of person is most likely to be ticklish.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

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

Make a backbone model to explore human anatomy and life science.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

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

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Learn all about balance and motion as your child designs a corn maze!

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Learn whether writing things down really makes things easier to remember.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

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.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.