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

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

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

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

This science fair project idea examines the reason boats are shaped and engineered.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

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.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

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

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.