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Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

This experiment will investigate whether reward or punishment is more apt to motivate people.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Here's a fourth grade science craft with lots of benefits: it's good for birds, good for your child's learning, and good for the planet, too.

The goal of this science fair project was to examine how different angles of decline affect the tipping point of a vehicle.

This science fair project idea tests the efficacy of both synthetic and natural antibiotics.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

This project concerns activity happening millions of miles away, on the sun.

Start your toy engines -- this is going to be a fast and friction-filled race!

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

Here's a simple craft activity that can help your youngster better visualize the life cycle of a frog as a circle.

Science fair project that studies how the brain transforms man-made symbols into meaningful concepts.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

Explore concepts in current and coltage with these Van de Graaff generator experiments.

Enjoy those warm spring and summer nights with your child while teaching some basic astronomy at the same time.

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

This science fair experiment examines the relationship between gender, age, and smiling.

Young physicists learn about apparent weightlessnessâthat weird sensation you sometimes feel in elevators, turbulent airplanes, and roller coasters.

Science fair project that compares tree leaf size and shape based on the leaf's position in the tree. Is their is a noticeable difference between high and low?

High school students learn about resistance, resistivity, and if copper is the best metal conductor in this great physics science fair project idea.

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