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This project compares the strength of one, two, and three-ply toilet paper.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

This science fair project idea explores how length affects the weight a bridge can hold.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project idea investigates the hardness property of minerals.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

Do you think heat can affect a plant's growth rate?

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.

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.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea determines what household items are good conductors of electricity.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

This science fair project examines how seeds hitchhike on animals and clothing.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

This science fair project idea determines what household items are good conductors of electricity.

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

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water