Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

The purpose of this science fair project is to build a basic radio.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

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

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.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

This biodiversity project examines the biodiversity in your own backyard.

This fun science fair project idea helps students learn how acid rains are formed and explore how acid rain damages the environment.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

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

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

This science fair project idea compares biodiversity between drops of water.

Try hammering some plants with your kids to teach them a valuable lesson in flower science while making beautiful artwork in the process!

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

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.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

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

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

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.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!