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This science fair project idea explores whether talking to a plant will help it grow.

This science fair project idea experiments with spinning color wheels and optical illusions.

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

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

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

This science fair project idea produces varying pitches of sound.

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Here's a fun and simple activity to introduce your child to surface tension, and pull an awesome stunt in the process!

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

This science fair project idea produces sounds by creating vibrations using different objects.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.