This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

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

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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

In this project students experiment with making music using only glasses of water.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

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

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!

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

Find out which kind of bubble wrap fares best when put in impact.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

This science fair project idea explores how much force is needed to move a lever at different distances from the fulcrum.

This science research project challenges students to think of more effective lobster farming methods.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.