This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

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 project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

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.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

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.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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

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 optical distances change the apparent size of an object as seen through a magnifying lens.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

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

Use pepper and soap to discover some fun facts about the properties of water.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.